Description
In check_user_token in util.c in the Yubico PAM module (aka pam_yubico) 2.18 through 2.25, successful logins can leak file descriptors to the auth mapping file, which can lead to information disclosure (serial number of a device) and/or DoS (reaching the maximum number of file descriptors).
References (3)
Core 3
Core References
Issue Tracking, Third Party Advisory x_refsource_confirm
https://bugzilla.opensuse.org/show_bug.cgi?id=1088027
Patch x_refsource_confirm
https://github.com/Yubico/yubico-pam/commit/0f6ceabab0a8849b47f67d727aa526c2656089ba
Issue Tracking, Third Party Advisory x_refsource_confirm
https://github.com/Yubico/yubico-pam/issues/136
Scores
CVSS v3
8.2
EPSS
0.0049
EPSS Percentile
65.7%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Details
CWE
CWE-200
Status
published
Products (1)
yubico/yubico_pam
2.18 - 2.25
Published
Apr 04, 2018
Tracked Since
Feb 18, 2026