Segmentation Fault Triggered by Modifying Only pac_opaque_key in EAP-FAST Authentication Process
早川 拓人
Takuto.Hayakawa at soliton.co.jp
Mon May 26 04:13:19 UTC 2025
Hi!
We have identified an issue in FreeRADIUS version 3.2.7 where a segmentation fault occurs when performing EAP-FAST authentication after modifying only the pac_opaque_key.
Below is the debug log captured at the time of the segmentation fault:
====================
FreeRADIUS Version 3.2.7
Copyright (C) 1999-2023 The FreeRADIUS server project and contributors
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE
You may redistribute copies of FreeRADIUS under the terms of the
GNU General Public License
For more information about these matters, see the file named COPYRIGHT
Starting - reading configuration files ...
including dictionary file /usr/local/share/freeradius/dictionary
including dictionary file /usr/local/share/freeradius/dictionary.dhcp
including dictionary file /usr/local/share/freeradius/dictionary.vqp
including dictionary file /usr/local/etc/raddb/dictionary
including configuration file /usr/local/etc/raddb/radiusd.conf
including configuration file /usr/local/etc/raddb/proxy.conf
including configuration file /usr/local/etc/raddb/clients.conf
including files in directory /usr/local/etc/raddb/mods-enabled/
including configuration file /usr/local/etc/raddb/mods-enabled/expr
including configuration file /usr/local/etc/raddb/mods-enabled/attr_filter
including configuration file /usr/local/etc/raddb/mods-enabled/preprocess
including configuration file /usr/local/etc/raddb/mods-enabled/linelog
including configuration file /usr/local/etc/raddb/mods-enabled/sradutmp
including configuration file /usr/local/etc/raddb/mods-enabled/replicate
including configuration file /usr/local/etc/raddb/mods-enabled/passwd
including configuration file /usr/local/etc/raddb/mods-enabled/detail.log
including configuration file /usr/local/etc/raddb/mods-enabled/radutmp
including configuration file /usr/local/etc/raddb/mods-enabled/unix
including configuration file /usr/local/etc/raddb/mods-enabled/digest
including configuration file /usr/local/etc/raddb/mods-enabled/always
including configuration file /usr/local/etc/raddb/mods-enabled/ntlm_auth
including configuration file /usr/local/etc/raddb/mods-enabled/realm
including configuration file /usr/local/etc/raddb/mods-enabled/totp
including configuration file /usr/local/etc/raddb/mods-enabled/unpack
including configuration file /usr/local/etc/raddb/mods-enabled/echo
including configuration file /usr/local/etc/raddb/mods-enabled/detail
including configuration file /usr/local/etc/raddb/mods-enabled/dynamic_clients
including configuration file /usr/local/etc/raddb/mods-enabled/files
including configuration file /usr/local/etc/raddb/mods-enabled/chap
including configuration file /usr/local/etc/raddb/mods-enabled/logintime
including configuration file /usr/local/etc/raddb/mods-enabled/pap
including configuration file /usr/local/etc/raddb/mods-enabled/eap
including configuration file /usr/local/etc/raddb/mods-enabled/mschap
including configuration file /usr/local/etc/raddb/mods-enabled/expiration
including configuration file /usr/local/etc/raddb/mods-enabled/proxy_rate_limit
including configuration file /usr/local/etc/raddb/mods-enabled/soh
including configuration file /usr/local/etc/raddb/mods-enabled/date
including configuration file /usr/local/etc/raddb/mods-enabled/utf8
including configuration file /usr/local/etc/raddb/mods-enabled/exec
including files in directory /usr/local/etc/raddb/policy.d/
including configuration file /usr/local/etc/raddb/policy.d/control
including configuration file /usr/local/etc/raddb/policy.d/filter
including configuration file /usr/local/etc/raddb/policy.d/canonicalization
including configuration file /usr/local/etc/raddb/policy.d/moonshot-targeted-ids
including configuration file /usr/local/etc/raddb/policy.d/operator-name
including configuration file /usr/local/etc/raddb/policy.d/cui
including configuration file /usr/local/etc/raddb/policy.d/dhcp
including configuration file /usr/local/etc/raddb/policy.d/debug
including configuration file /usr/local/etc/raddb/policy.d/abfab-tr
including configuration file /usr/local/etc/raddb/policy.d/eap
including configuration file /usr/local/etc/raddb/policy.d/rfc7542
including configuration file /usr/local/etc/raddb/policy.d/accounting
including files in directory /usr/local/etc/raddb/sites-enabled/
including configuration file /usr/local/etc/raddb/sites-enabled/default
including configuration file /usr/local/etc/raddb/sites-enabled/inner-tunnel
main {
security {
allow_core_dumps = no
}
name = "radiusd"
prefix = "/usr/local"
localstatedir = "/usr/local/var"
logdir = "/usr/local/var/log/radius"
run_dir = "/usr/local/var/run/radiusd"
}
main {
name = "radiusd"
prefix = "/usr/local"
localstatedir = "/usr/local/var"
sbindir = "/usr/local/sbin"
logdir = "/usr/local/var/log/radius"
run_dir = "/usr/local/var/run/radiusd"
libdir = "/usr/local/lib"
radacctdir = "/usr/local/var/log/radius/radacct"
hostname_lookups = no
max_request_time = 30
proxy_dedup_window = 1
cleanup_delay = 5
max_requests = 16384
max_fds = 512
postauth_client_lost = no
pidfile = "/usr/local/var/run/radiusd/radiusd.pid"
checkrad = "/usr/local/sbin/checkrad"
debug_level = 0
proxy_requests = yes
log {
stripped_names = no
auth = no
auth_badpass = no
auth_goodpass = no
colourise = yes
msg_denied = "You are already logged in - access denied"
}
resources {
}
security {
max_attributes = 200
reject_delay = 1.000000
status_server = yes
require_message_authenticator = "auto"
limit_proxy_state = "auto"
allow_vulnerable_openssl = "no"
}
unlang {
group_stop_return = no
policy_stop_return = no
}
}
radiusd: #### Loading Realms and Home Servers ####
proxy server {
retry_delay = 5
retry_count = 3
default_fallback = no
dead_time = 120
wake_all_if_all_dead = no
}
home_server localhost {
nonblock = no
ipaddr = 127.0.0.1
port = 1812
type = "auth"
secret = <<< secret >>>
response_window = 20.000000
response_timeouts = 1
max_outstanding = 65536
zombie_period = 40
status_check = "status-server"
ping_interval = 30
check_interval = 30
check_timeout = 4
num_answers_to_alive = 3
revive_interval = 120
limit {
max_connections = 16
max_requests = 0
lifetime = 0
idle_timeout = 0
}
coa {
irt = 2
mrt = 16
mrc = 5
mrd = 30
}
}
home_server_pool my_auth_failover {
type = fail-over
home_server = localhost
}
realm example.com {
auth_pool = my_auth_failover
}
realm LOCAL {
}
radiusd: #### Loading Clients ####
client localhost {
ipaddr = 0.0.0.0
secret = <<< secret >>>
nas_type = "other"
proto = "*"
limit {
max_connections = 16
lifetime = 0
idle_timeout = 900
}
}
Shared secret for client localhost is short, and likely can be broken by an attacker.
client localhost_ipv6 {
ipv6addr = ::1
secret = <<< secret >>>
limit {
max_connections = 16
lifetime = 0
idle_timeout = 30
}
}
Shared secret for client localhost_ipv6 is short, and likely can be broken by an attacker.
Debugger not attached
Configuration version: 92f8-a19c-a8b2-e589
# Creating Auth-Type = mschap
# Creating Auth-Type = digest
# Creating Auth-Type = eap
# Creating Auth-Type = PAP
# Creating Auth-Type = CHAP
# Creating Auth-Type = MS-CHAP
# Creating Autz-Type = New-TLS-Connection
radiusd: #### Instantiating modules ####
modules {
# Loaded module rlm_expr
# Loading module "expr" from file /usr/local/etc/raddb/mods-enabled/expr
expr {
safe_characters = "@abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_: /äéöüàâæçèéêëîïôœùûüaÿÄÉÖÜßÀÂÆÇÈÉÊËÎÏÔŒÙÛÜŸ"
}
# Loaded module rlm_attr_filter
# Loading module "attr_filter.post-proxy" from file /usr/local/etc/raddb/mods-enabled/attr_filter
attr_filter attr_filter.post-proxy {
filename = "/usr/local/etc/raddb/mods-config/attr_filter/post-proxy"
key = "%{Realm}"
relaxed = no
}
# Loading module "attr_filter.pre-proxy" from file /usr/local/etc/raddb/mods-enabled/attr_filter
attr_filter attr_filter.pre-proxy {
filename = "/usr/local/etc/raddb/mods-config/attr_filter/pre-proxy"
key = "%{Realm}"
relaxed = no
}
# Loading module "attr_filter.access_reject" from file /usr/local/etc/raddb/mods-enabled/attr_filter
attr_filter attr_filter.access_reject {
filename = "/usr/local/etc/raddb/mods-config/attr_filter/access_reject"
key = "%{User-Name}"
relaxed = no
}
# Loading module "attr_filter.access_challenge" from file /usr/local/etc/raddb/mods-enabled/attr_filter
attr_filter attr_filter.access_challenge {
filename = "/usr/local/etc/raddb/mods-config/attr_filter/access_challenge"
key = "%{User-Name}"
relaxed = no
}
# Loading module "attr_filter.accounting_response" from file /usr/local/etc/raddb/mods-enabled/attr_filter
attr_filter attr_filter.accounting_response {
filename = "/usr/local/etc/raddb/mods-config/attr_filter/accounting_response"
key = "%{User-Name}"
relaxed = no
}
# Loading module "attr_filter.coa" from file /usr/local/etc/raddb/mods-enabled/attr_filter
attr_filter attr_filter.coa {
filename = "/usr/local/etc/raddb/mods-config/attr_filter/coa"
key = "%{User-Name}"
relaxed = no
}
# Loaded module rlm_preprocess
# Loading module "preprocess" from file /usr/local/etc/raddb/mods-enabled/preprocess
preprocess {
huntgroups = "/usr/local/etc/raddb/mods-config/preprocess/huntgroups"
hints = "/usr/local/etc/raddb/mods-config/preprocess/hints"
with_ascend_hack = no
ascend_channels_per_line = 23
with_ntdomain_hack = no
with_specialix_jetstream_hack = no
with_cisco_vsa_hack = no
with_alvarion_vsa_hack = no
}
# Loaded module rlm_linelog
# Loading module "linelog" from file /usr/local/etc/raddb/mods-enabled/linelog
linelog {
filename = "/usr/local/var/log/radius/linelog"
escape_filenames = no
syslog_severity = "info"
permissions = 384
format = "This is a log message for %{User-Name}"
reference = "messages.%{%{reply:Packet-Type}:-default}"
}
# Loading module "log_accounting" from file /usr/local/etc/raddb/mods-enabled/linelog
linelog log_accounting {
filename = "/usr/local/var/log/radius/linelog-accounting"
escape_filenames = no
syslog_severity = "info"
permissions = 384
format = ""
reference = "Accounting-Request.%{%{Acct-Status-Type}:-unknown}"
}
# Loaded module rlm_radutmp
# Loading module "sradutmp" from file /usr/local/etc/raddb/mods-enabled/sradutmp
radutmp sradutmp {
filename = "/usr/local/var/log/radius/sradutmp"
username = "%{User-Name}"
case_sensitive = yes
check_with_nas = yes
permissions = 420
caller_id = no
}
# Loaded module rlm_replicate
# Loading module "replicate" from file /usr/local/etc/raddb/mods-enabled/replicate
# Loaded module rlm_passwd
# Loading module "etc_passwd" from file /usr/local/etc/raddb/mods-enabled/passwd
passwd etc_passwd {
filename = "/etc/passwd"
format = "*User-Name:Crypt-Password:"
delimiter = ":"
ignore_nislike = no
ignore_empty = yes
allow_multiple_keys = no
hash_size = 100
}
# Loaded module rlm_detail
# Loading module "auth_log" from file /usr/local/etc/raddb/mods-enabled/detail.log
detail auth_log {
filename = "/usr/local/var/log/radius/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/auth-detail-%Y%m%d"
header = "%t"
permissions = 384
locking = no
dates_as_integer = no
escape_filenames = no
log_packet_header = no
}
# Loading module "reply_log" from file /usr/local/etc/raddb/mods-enabled/detail.log
detail reply_log {
filename = "/usr/local/var/log/radius/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/reply-detail-%Y%m%d"
header = "%t"
permissions = 384
locking = no
dates_as_integer = no
escape_filenames = no
log_packet_header = no
}
# Loading module "pre_proxy_log" from file /usr/local/etc/raddb/mods-enabled/detail.log
detail pre_proxy_log {
filename = "/usr/local/var/log/radius/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/pre-proxy-detail-%Y%m%d"
header = "%t"
permissions = 384
locking = no
dates_as_integer = no
escape_filenames = no
log_packet_header = no
}
# Loading module "post_proxy_log" from file /usr/local/etc/raddb/mods-enabled/detail.log
detail post_proxy_log {
filename = "/usr/local/var/log/radius/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/post-proxy-detail-%Y%m%d"
header = "%t"
permissions = 384
locking = no
dates_as_integer = no
escape_filenames = no
log_packet_header = no
}
# Loading module "radutmp" from file /usr/local/etc/raddb/mods-enabled/radutmp
radutmp {
filename = "/usr/local/var/log/radius/radutmp"
username = "%{User-Name}"
case_sensitive = yes
check_with_nas = yes
permissions = 384
caller_id = yes
}
# Loaded module rlm_unix
# Loading module "unix" from file /usr/local/etc/raddb/mods-enabled/unix
unix {
radwtmp = "/usr/local/var/log/radius/radwtmp"
}
Creating attribute Unix-Group
# Loaded module rlm_digest
# Loading module "digest" from file /usr/local/etc/raddb/mods-enabled/digest
# Loaded module rlm_always
# Loading module "reject" from file /usr/local/etc/raddb/mods-enabled/always
always reject {
rcode = "reject"
simulcount = 0
mpp = no
}
# Loading module "fail" from file /usr/local/etc/raddb/mods-enabled/always
always fail {
rcode = "fail"
simulcount = 0
mpp = no
}
# Loading module "ok" from file /usr/local/etc/raddb/mods-enabled/always
always ok {
rcode = "ok"
simulcount = 0
mpp = no
}
# Loading module "handled" from file /usr/local/etc/raddb/mods-enabled/always
always handled {
rcode = "handled"
simulcount = 0
mpp = no
}
# Loading module "invalid" from file /usr/local/etc/raddb/mods-enabled/always
always invalid {
rcode = "invalid"
simulcount = 0
mpp = no
}
# Loading module "userlock" from file /usr/local/etc/raddb/mods-enabled/always
always userlock {
rcode = "userlock"
simulcount = 0
mpp = no
}
# Loading module "notfound" from file /usr/local/etc/raddb/mods-enabled/always
always notfound {
rcode = "notfound"
simulcount = 0
mpp = no
}
# Loading module "noop" from file /usr/local/etc/raddb/mods-enabled/always
always noop {
rcode = "noop"
simulcount = 0
mpp = no
}
# Loading module "updated" from file /usr/local/etc/raddb/mods-enabled/always
always updated {
rcode = "updated"
simulcount = 0
mpp = no
}
# Loaded module rlm_exec
# Loading module "ntlm_auth" from file /usr/local/etc/raddb/mods-enabled/ntlm_auth
exec ntlm_auth {
wait = yes
program = "/path/to/ntlm_auth --request-nt-key --domain=MYDOMAIN --username=%{mschap:User-Name} --password=%{User-Password}"
shell_escape = yes
}
# Loaded module rlm_realm
# Loading module "IPASS" from file /usr/local/etc/raddb/mods-enabled/realm
realm IPASS {
format = "prefix"
delimiter = "/"
ignore_default = no
ignore_null = no
}
# Loading module "suffix" from file /usr/local/etc/raddb/mods-enabled/realm
realm suffix {
format = "suffix"
delimiter = "@"
ignore_default = no
ignore_null = no
}
# Loading module "bangpath" from file /usr/local/etc/raddb/mods-enabled/realm
realm bangpath {
format = "prefix"
delimiter = "!"
ignore_default = no
ignore_null = no
}
# Loading module "realmpercent" from file /usr/local/etc/raddb/mods-enabled/realm
realm realmpercent {
format = "suffix"
delimiter = "%"
ignore_default = no
ignore_null = no
}
# Loading module "ntdomain" from file /usr/local/etc/raddb/mods-enabled/realm
realm ntdomain {
format = "prefix"
delimiter = "\"
ignore_default = no
ignore_null = no
}
# Loaded module rlm_totp
# Loading module "totp" from file /usr/local/etc/raddb/mods-enabled/totp
totp {
time_step = 30
otp_length = 6
lookback_steps = 1
lookback_interval = 30
lookforward_steps = 0
}
# Loaded module rlm_unpack
# Loading module "unpack" from file /usr/local/etc/raddb/mods-enabled/unpack
# Loading module "echo" from file /usr/local/etc/raddb/mods-enabled/echo
exec echo {
wait = yes
program = "/bin/echo %{User-Name}"
input_pairs = "request"
output_pairs = "reply"
shell_escape = yes
}
# Loading module "detail" from file /usr/local/etc/raddb/mods-enabled/detail
detail {
filename = "/usr/local/var/log/radius/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/detail-%Y%m%d"
header = "%t"
permissions = 384
locking = no
dates_as_integer = no
escape_filenames = no
log_packet_header = no
}
# Loaded module rlm_dynamic_clients
# Loading module "dynamic_clients" from file /usr/local/etc/raddb/mods-enabled/dynamic_clients
# Loaded module rlm_files
# Loading module "files" from file /usr/local/etc/raddb/mods-enabled/files
files {
filename = "/usr/local/etc/raddb/mods-config/files/authorize"
acctusersfile = "/usr/local/etc/raddb/mods-config/files/accounting"
preproxy_usersfile = "/usr/local/etc/raddb/mods-config/files/pre-proxy"
}
# Loaded module rlm_chap
# Loading module "chap" from file /usr/local/etc/raddb/mods-enabled/chap
# Loaded module rlm_logintime
# Loading module "logintime" from file /usr/local/etc/raddb/mods-enabled/logintime
logintime {
minimum_timeout = 60
}
# Loaded module rlm_pap
# Loading module "pap" from file /usr/local/etc/raddb/mods-enabled/pap
pap {
normalise = yes
}
# Loaded module rlm_eap
# Loading module "eap" from file /usr/local/etc/raddb/mods-enabled/eap
eap {
default_eap_type = "md5"
timer_expire = 60
max_eap_type = 52
ignore_unknown_eap_types = no
cisco_accounting_username_bug = no
max_sessions = 16384
dedup_key = ""
}
# Loaded module rlm_mschap
# Loading module "mschap" from file /usr/local/etc/raddb/mods-enabled/mschap
mschap {
use_mppe = yes
require_encryption = no
require_strong = no
with_ntdomain_hack = yes
passchange {
}
allow_retry = yes
winbind_retry_with_normalised_username = no
}
# Loaded module rlm_expiration
# Loading module "expiration" from file /usr/local/etc/raddb/mods-enabled/expiration
# Loaded module rlm_proxy_rate_limit
# Loading module "proxy_rate_limit" from file /usr/local/etc/raddb/mods-enabled/proxy_rate_limit
proxy_rate_limit {
max_entries = 2048
idle_timeout = 10
num_subtables = 256
window = 1
}
# Loaded module rlm_soh
# Loading module "soh" from file /usr/local/etc/raddb/mods-enabled/soh
soh {
dhcp = yes
}
# Loaded module rlm_date
# Loading module "date" from file /usr/local/etc/raddb/mods-enabled/date
date {
format = "%b %e %Y %H:%M:%S %Z"
utc = no
}
# Loading module "wispr2date" from file /usr/local/etc/raddb/mods-enabled/date
date wispr2date {
format = "%Y-%m-%dT%H:%M:%S"
utc = no
}
# Loaded module rlm_utf8
# Loading module "utf8" from file /usr/local/etc/raddb/mods-enabled/utf8
# Loading module "exec" from file /usr/local/etc/raddb/mods-enabled/exec
exec {
wait = no
input_pairs = "request"
shell_escape = yes
timeout = 10
}
instantiate {
}
# Instantiating module "attr_filter.post-proxy" from file /usr/local/etc/raddb/mods-enabled/attr_filter
reading pairlist file /usr/local/etc/raddb/mods-config/attr_filter/post-proxy
# Instantiating module "attr_filter.pre-proxy" from file /usr/local/etc/raddb/mods-enabled/attr_filter
reading pairlist file /usr/local/etc/raddb/mods-config/attr_filter/pre-proxy
# Instantiating module "attr_filter.access_reject" from file /usr/local/etc/raddb/mods-enabled/attr_filter
reading pairlist file /usr/local/etc/raddb/mods-config/attr_filter/access_reject
# Instantiating module "attr_filter.access_challenge" from file /usr/local/etc/raddb/mods-enabled/attr_filter
reading pairlist file /usr/local/etc/raddb/mods-config/attr_filter/access_challenge
# Instantiating module "attr_filter.accounting_response" from file /usr/local/etc/raddb/mods-enabled/attr_filter
reading pairlist file /usr/local/etc/raddb/mods-config/attr_filter/accounting_response
# Instantiating module "attr_filter.coa" from file /usr/local/etc/raddb/mods-enabled/attr_filter
reading pairlist file /usr/local/etc/raddb/mods-config/attr_filter/coa
# Instantiating module "preprocess" from file /usr/local/etc/raddb/mods-enabled/preprocess
reading pairlist file /usr/local/etc/raddb/mods-config/preprocess/huntgroups
reading pairlist file /usr/local/etc/raddb/mods-config/preprocess/hints
# Instantiating module "linelog" from file /usr/local/etc/raddb/mods-enabled/linelog
# Instantiating module "log_accounting" from file /usr/local/etc/raddb/mods-enabled/linelog
# Instantiating module "etc_passwd" from file /usr/local/etc/raddb/mods-enabled/passwd
rlm_passwd: nfields: 3 keyfield 0(User-Name) listable: no
# Instantiating module "auth_log" from file /usr/local/etc/raddb/mods-enabled/detail.log
rlm_detail (auth_log): 'User-Password' suppressed, will not appear in detail output
# Instantiating module "reply_log" from file /usr/local/etc/raddb/mods-enabled/detail.log
# Instantiating module "pre_proxy_log" from file /usr/local/etc/raddb/mods-enabled/detail.log
# Instantiating module "post_proxy_log" from file /usr/local/etc/raddb/mods-enabled/detail.log
# Instantiating module "reject" from file /usr/local/etc/raddb/mods-enabled/always
# Instantiating module "fail" from file /usr/local/etc/raddb/mods-enabled/always
# Instantiating module "ok" from file /usr/local/etc/raddb/mods-enabled/always
# Instantiating module "handled" from file /usr/local/etc/raddb/mods-enabled/always
# Instantiating module "invalid" from file /usr/local/etc/raddb/mods-enabled/always
# Instantiating module "userlock" from file /usr/local/etc/raddb/mods-enabled/always
# Instantiating module "notfound" from file /usr/local/etc/raddb/mods-enabled/always
# Instantiating module "noop" from file /usr/local/etc/raddb/mods-enabled/always
# Instantiating module "updated" from file /usr/local/etc/raddb/mods-enabled/always
# Instantiating module "IPASS" from file /usr/local/etc/raddb/mods-enabled/realm
# Instantiating module "suffix" from file /usr/local/etc/raddb/mods-enabled/realm
# Instantiating module "bangpath" from file /usr/local/etc/raddb/mods-enabled/realm
# Instantiating module "realmpercent" from file /usr/local/etc/raddb/mods-enabled/realm
# Instantiating module "ntdomain" from file /usr/local/etc/raddb/mods-enabled/realm
# Instantiating module "totp" from file /usr/local/etc/raddb/mods-enabled/totp
# Instantiating module "detail" from file /usr/local/etc/raddb/mods-enabled/detail
# Instantiating module "files" from file /usr/local/etc/raddb/mods-enabled/files
reading pairlist file /usr/local/etc/raddb/mods-config/files/authorize
reading pairlist file /usr/local/etc/raddb/mods-config/files/accounting
reading pairlist file /usr/local/etc/raddb/mods-config/files/pre-proxy
# Instantiating module "logintime" from file /usr/local/etc/raddb/mods-enabled/logintime
# Instantiating module "pap" from file /usr/local/etc/raddb/mods-enabled/pap
# Instantiating module "eap" from file /usr/local/etc/raddb/mods-enabled/eap
# Linked to sub-module rlm_eap_md5
# Linked to sub-module rlm_eap_gtc
gtc {
challenge = "Password: "
auth_type = "PAP"
}
# Linked to sub-module rlm_eap_tls
tls {
tls = "tls-common"
}
tls-config tls-common {
verify_depth = 0
ca_path = "/usr/local/etc/raddb/certs"
pem_file_type = yes
private_key_file = "/usr/local/etc/raddb/certs/server.pem"
certificate_file = "/usr/local/etc/raddb/certs/server.pem"
ca_file = "/usr/local/etc/raddb/certs/ca.pem"
private_key_password = <<< secret >>>
fragment_size = 1024
include_length = yes
auto_chain = yes
check_crl = no
check_all_crl = no
ca_path_reload_interval = 0
cipher_list = "DEFAULT"
cipher_server_preference = no
reject_unknown_intermediate_ca = no
ecdh_curve = ""
tls_max_version = "1.2"
tls_min_version = "1.2"
cache {
enable = no
lifetime = 24
max_entries = 255
}
verify {
skip_if_ocsp_ok = no
}
ocsp {
enable = no
override_cert_url = yes
url = "http://127.0.0.1/ocsp/"
use_nonce = yes
timeout = 0
softfail = no
}
}
# Linked to sub-module rlm_eap_ttls
ttls {
tls = "tls-common"
default_eap_type = "fast"
copy_request_to_tunnel = no
use_tunneled_reply = no
virtual_server = "inner-tunnel"
include_length = yes
require_client_cert = no
}
tls: Using cached TLS configuration from previous invocation
# Linked to sub-module rlm_eap_peap
peap {
tls = "tls-common"
default_eap_type = "mschapv2"
copy_request_to_tunnel = no
use_tunneled_reply = no
proxy_tunneled_request_as_eap = yes
virtual_server = "inner-tunnel"
soh = no
require_client_cert = no
}
tls: Using cached TLS configuration from previous invocation
# Linked to sub-module rlm_eap_mschapv2
mschapv2 {
with_ntdomain_hack = no
send_error = no
}
# Linked to sub-module rlm_eap_mschapv2
mschapv2 {
with_ntdomain_hack = no
send_error = no
identity = "freeradius.example"
}
# Linked to sub-module rlm_eap_fast
fast {
tls = "tls-common"
default_eap_type = "mschapv2"
virtual_server = "inner-tunnel"
cipher_list = "ALL:!EXPORT:!eNULL:!SSLv2"
require_client_cert = no
pac_lifetime = 604800
authority_identity = "freeradius"
pac_opaque_key = "D3EF443DF29944EB5E27B236F8086065"
copy_request_to_tunnel = yes
use_tunneled_reply = no
}
tls: Using cached TLS configuration from previous invocation
# Instantiating module "mschap" from file /usr/local/etc/raddb/mods-enabled/mschap
rlm_mschap (mschap): using internal authentication
# Instantiating module "expiration" from file /usr/local/etc/raddb/mods-enabled/expiration
# Instantiating module "proxy_rate_limit" from file /usr/local/etc/raddb/mods-enabled/proxy_rate_limit
} # modules
radiusd: #### Loading Virtual Servers ####
server { # from file /usr/local/etc/raddb/radiusd.conf
} # server
server default { # from file /usr/local/etc/raddb/sites-enabled/default
# Loading authenticate {...}
Compiling Auth-Type PAP for attr Auth-Type
Compiling Auth-Type CHAP for attr Auth-Type
Compiling Auth-Type MS-CHAP for attr Auth-Type
# Loading authorize {...}
Ignoring "sql" (see raddb/mods-available/README.rst)
Ignoring "ldap" (see raddb/mods-available/README.rst)
Compiling Autz-Type New-TLS-Connection for attr Autz-Type
# Loading preacct {...}
# Loading accounting {...}
# Loading post-auth {...}
Compiling Post-Auth-Type REJECT for attr Post-Auth-Type
Compiling Post-Auth-Type Challenge for attr Post-Auth-Type
Compiling Post-Auth-Type Client-Lost for attr Post-Auth-Type
} # server default
server inner-tunnel { # from file /usr/local/etc/raddb/sites-enabled/inner-tunnel
# Loading authenticate {...}
Compiling Auth-Type PAP for attr Auth-Type
Compiling Auth-Type CHAP for attr Auth-Type
Compiling Auth-Type MS-CHAP for attr Auth-Type
# Loading authorize {...}
# Loading post-proxy {...}
# Loading post-auth {...}
# Skipping contents of 'if' as it is always 'false' -- /usr/local/etc/raddb/sites-enabled/inner-tunnel:366
Compiling Post-Auth-Type REJECT for attr Post-Auth-Type
} # server inner-tunnel
radiusd: #### Opening IP addresses and Ports ####
listen {
type = "auth"
ipaddr = *
port = 0
limit {
max_connections = 16
lifetime = 0
idle_timeout = 900
}
}
listen {
type = "acct"
ipaddr = *
port = 0
limit {
max_connections = 16
lifetime = 0
idle_timeout = 30
}
}
listen {
type = "auth"
ipv6addr = ::
port = 0
limit {
max_connections = 16
lifetime = 0
idle_timeout = 30
}
}
listen {
type = "acct"
ipv6addr = ::
port = 0
limit {
max_connections = 16
lifetime = 0
idle_timeout = 30
}
}
listen {
type = "auth"
ipaddr = 127.0.0.1
port = 18120
}
Listening on auth address * port 1812 bound to server default
Listening on acct address * port 1813 bound to server default
Listening on auth address :: port 1812 bound to server default
Listening on acct address :: port 1813 bound to server default
Listening on auth address 127.0.0.1 port 18120 bound to server inner-tunnel
Listening on proxy address * port 35763
Listening on proxy address :: port 43914
Ready to process requests
(0) Received Access-Request Id 0 from 10.27.253.116:35453 to 10.27.253.187:1812 length 132
(0) User-Name = "anonymous"
(0) NAS-IP-Address = 127.0.0.1
(0) Calling-Station-Id = "02-00-00-00-00-01"
(0) Framed-MTU = 1400
(0) NAS-Port-Type = Wireless-802.11
(0) Service-Type = Framed-User
(0) Connect-Info = "CONNECT 11Mbps 802.11b"
(0) EAP-Message = 0x020a000e01616e6f6e796d6f7573
(0) Message-Authenticator = 0xcab062291ef86f8250861f7f1ff96e62
(0) # Executing section authorize from file /usr/local/etc/raddb/sites-enabled/default
(0) authorize {
(0) policy filter_username {
(0) if (&User-Name) {
(0) if (&User-Name) -> TRUE
(0) if (&User-Name) {
(0) if (&User-Name =~ / /) {
(0) if (&User-Name =~ / /) -> FALSE
(0) if (&User-Name =~ /@[^@]*@/ ) {
(0) if (&User-Name =~ /@[^@]*@/ ) -> FALSE
(0) if (&User-Name =~ /\.\./ ) {
(0) if (&User-Name =~ /\.\./ ) -> FALSE
(0) if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/)) {
(0) if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/)) -> FALSE
(0) if (&User-Name =~ /\.$/) {
(0) if (&User-Name =~ /\.$/) -> FALSE
(0) if (&User-Name =~ /@\./) {
(0) if (&User-Name =~ /@\./) -> FALSE
(0) } # if (&User-Name) = notfound
(0) } # policy filter_username = notfound
(0) [preprocess] = ok
(0) [chap] = noop
(0) [mschap] = noop
(0) [digest] = noop
(0) suffix: Checking for suffix after "@"
(0) suffix: No '@' in User-Name = "anonymous", looking up realm NULL
(0) suffix: No such realm "NULL"
(0) [suffix] = noop
(0) eap: Peer sent EAP Response (code 2) ID 10 length 14
(0) eap: EAP-Identity reply, returning 'ok' so we can short-circuit the rest of authorize
(0) [eap] = ok
(0) } # authorize = ok
(0) Found Auth-Type = eap
(0) # Executing group from file /usr/local/etc/raddb/sites-enabled/default
(0) authenticate {
(0) eap: Peer sent packet with method EAP Identity (1)
(0) eap: Using default_eap_type = MD5
(0) eap: Calling submodule eap_md5 to process data
(0) eap_md5: Issuing MD5 Challenge
(0) eap: Sending EAP Request (code 1) ID 11 length 22
(0) eap: EAP session adding &reply:State = 0xaee826abaee32297
(0) [eap] = handled
(0) } # authenticate = handled
(0) Using Post-Auth-Type Challenge
(0) # Executing group from file /usr/local/etc/raddb/sites-enabled/default
(0) Challenge { ... } # empty sub-section is ignored
(0) Sent Access-Challenge Id 0 from 10.27.253.187:1812 to 10.27.253.116:35453 length 80
(0) EAP-Message = 0x010b001604105828ed1880462a5b6a241c1404973cb6
(0) Message-Authenticator = 0x00000000000000000000000000000000
(0) State = 0xaee826abaee32297218f24d02553b7f2
(0) Finished request
Waking up in 4.9 seconds.
(1) Received Access-Request Id 1 from 10.27.253.116:35453 to 10.27.253.187:1812 length 142
(1) User-Name = "anonymous"
(1) NAS-IP-Address = 127.0.0.1
(1) Calling-Station-Id = "02-00-00-00-00-01"
(1) Framed-MTU = 1400
(1) NAS-Port-Type = Wireless-802.11
(1) Service-Type = Framed-User
(1) Connect-Info = "CONNECT 11Mbps 802.11b"
(1) EAP-Message = 0x020b0006032b
(1) State = 0xaee826abaee32297218f24d02553b7f2
(1) Message-Authenticator = 0x8151d591e61e8ebebf6d360d2ba40588
(1) session-state: No cached attributes
(1) # Executing section authorize from file /usr/local/etc/raddb/sites-enabled/default
(1) authorize {
(1) policy filter_username {
(1) if (&User-Name) {
(1) if (&User-Name) -> TRUE
(1) if (&User-Name) {
(1) if (&User-Name =~ / /) {
(1) if (&User-Name =~ / /) -> FALSE
(1) if (&User-Name =~ /@[^@]*@/ ) {
(1) if (&User-Name =~ /@[^@]*@/ ) -> FALSE
(1) if (&User-Name =~ /\.\./ ) {
(1) if (&User-Name =~ /\.\./ ) -> FALSE
(1) if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/)) {
(1) if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/)) -> FALSE
(1) if (&User-Name =~ /\.$/) {
(1) if (&User-Name =~ /\.$/) -> FALSE
(1) if (&User-Name =~ /@\./) {
(1) if (&User-Name =~ /@\./) -> FALSE
(1) } # if (&User-Name) = notfound
(1) } # policy filter_username = notfound
(1) [preprocess] = ok
(1) [chap] = noop
(1) [mschap] = noop
(1) [digest] = noop
(1) suffix: Checking for suffix after "@"
(1) suffix: No '@' in User-Name = "anonymous", looking up realm NULL
(1) suffix: No such realm "NULL"
(1) [suffix] = noop
(1) eap: Peer sent EAP Response (code 2) ID 11 length 6
(1) eap: No EAP Start, assuming it's an on-going EAP conversation
(1) [eap] = updated
(1) [files] = noop
(1) [expiration] = noop
(1) [logintime] = noop
Not doing PAP as Auth-Type is already set.
(1) [pap] = noop
(1) } # authorize = updated
(1) Found Auth-Type = eap
(1) # Executing group from file /usr/local/etc/raddb/sites-enabled/default
(1) authenticate {
(1) eap: Removing EAP session with state 0xaee826abaee32297
(1) eap: Previous EAP request found for state 0xaee826abaee32297, released from the list
(1) eap: Peer sent packet with method EAP NAK (3)
(1) eap: Found mutually acceptable type FAST (43)
(1) eap: Found compatible type in NAK - EAP-Type = FAST
(1) eap: Calling submodule eap_fast to process data
(1) eap_fast: (TLS) FAST -Initiating new session
(1) eap_fast: Over-riding main cipher list with 'ALL:!EXPORT:!eNULL:!SSLv2'
(1) eap_fast: Setting security level to 0 to allow anonymous cipher suites
(1) eap: Sending EAP Request (code 1) ID 12 length 26
(1) eap: EAP session adding &reply:State = 0xaee826abafe40d97
(1) [eap] = handled
(1) } # authenticate = handled
(1) Using Post-Auth-Type Challenge
(1) # Executing group from file /usr/local/etc/raddb/sites-enabled/default
(1) Challenge { ... } # empty sub-section is ignored
(1) session-state: Saving cached attributes
(1) Framed-MTU = 984
(1) Sent Access-Challenge Id 1 from 10.27.253.187:1812 to 10.27.253.116:35453 length 84
(1) EAP-Message = 0x010c001a2b2100040010ebad53172137d2c5c387b6351e705ae2
(1) Message-Authenticator = 0x00000000000000000000000000000000
(1) State = 0xaee826abafe40d97218f24d02553b7f2
(1) Finished request
Waking up in 4.9 seconds.
(2) Received Access-Request Id 2 from 10.27.253.116:35453 to 10.27.253.187:1812 length 434
(2) User-Name = "anonymous"
(2) NAS-IP-Address = 127.0.0.1
(2) Calling-Station-Id = "02-00-00-00-00-01"
(2) Framed-MTU = 1400
(2) NAS-Port-Type = Wireless-802.11
(2) Service-Type = Framed-User
(2) Connect-Info = "CONNECT 11Mbps 802.11b"
(2) EAP-Message = 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
(2) State = 0xaee826abafe40d97218f24d02553b7f2
(2) Message-Authenticator = 0x0c43e6875536fdfc2f51ff168369acf8
(2) Restoring &session-state
(2) &session-state:Framed-MTU = 984
(2) # Executing section authorize from file /usr/local/etc/raddb/sites-enabled/default
(2) authorize {
(2) policy filter_username {
(2) if (&User-Name) {
(2) if (&User-Name) -> TRUE
(2) if (&User-Name) {
(2) if (&User-Name =~ / /) {
(2) if (&User-Name =~ / /) -> FALSE
(2) if (&User-Name =~ /@[^@]*@/ ) {
(2) if (&User-Name =~ /@[^@]*@/ ) -> FALSE
(2) if (&User-Name =~ /\.\./ ) {
(2) if (&User-Name =~ /\.\./ ) -> FALSE
(2) if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/)) {
(2) if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/)) -> FALSE
(2) if (&User-Name =~ /\.$/) {
(2) if (&User-Name =~ /\.$/) -> FALSE
(2) if (&User-Name =~ /@\./) {
(2) if (&User-Name =~ /@\./) -> FALSE
(2) } # if (&User-Name) = notfound
(2) } # policy filter_username = notfound
(2) [preprocess] = ok
(2) [chap] = noop
(2) [mschap] = noop
(2) [digest] = noop
(2) suffix: Checking for suffix after "@"
(2) suffix: No '@' in User-Name = "anonymous", looking up realm NULL
(2) suffix: No such realm "NULL"
(2) [suffix] = noop
(2) eap: Peer sent EAP Response (code 2) ID 12 length 296
(2) eap: Continuing tunnel setup
(2) [eap] = ok
(2) } # authorize = ok
(2) Found Auth-Type = eap
(2) # Executing group from file /usr/local/etc/raddb/sites-enabled/default
(2) authenticate {
(2) eap: Removing EAP session with state 0xaee826abafe40d97
(2) eap: Previous EAP request found for state 0xaee826abafe40d97, released from the list
(2) eap: Peer sent packet with method EAP FAST (43)
(2) eap: Calling submodule eap_fast to process data
(2) eap_fast: Authenticate
(2) eap_fast: (TLS) EAP Done initial handshake
(2) eap_fast: (TLS) FAST - Handshake state - before SSL initialization
(2) eap_fast: (TLS) FAST - Handshake state - Server before SSL initialization
(2) eap_fast: (TLS) FAST - Handshake state - Server before SSL initialization
(2) eap_fast: (TLS) FAST - recv TLS 1.3 Handshake, ClientHello
(2) eap_fast: PAC provided via ClientHello SessionTicket extension
zsh: segmentation fault sudo /usr/local/sbin/radiusd -X
====================
Steps to reproduce:
・Perform EAP-FAST authentication successfully.
・Stop FreeRADIUS and modify only the pac_opaque_key.
・Attempt EAP-FAST authentication again with the same user.
・FreeRADIUS crashes due to a segmentation fault.
Cause:
We have confirmed that the EVP_DecryptFinal_ex function returns either 1 or 0, but the return value is being checked using a condition that evaluates whether it is less than 0. This leads to a segmentation fault.
Resolution:
Our investigation revealed that the issue can be avoided by applying the following modification:
src/modules/rlm_eap/types/rlm_eap_fast/eap_fast_crypto.c
====================
- if (ret < 0) return -1;
+ if (ret == 0) return -1;
====================
/早川
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