CVE-2018-9275 json
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 t…
published 2018-04-04 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-20869
- cvss
- 8.2
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 0
- none known
Summary
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).
Patch / fix
- yubico-pam Debian 14, Debian 13, Debian 12 2.26-1
debian advisories DEBIAN-CVE-2018-9275
- pam_yubico openSUSE Tumbleweed 2.27-1.5
opensuse advisories openSUSE-SU-2024:11146-1
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2018-9275 updated cvss 6.5
pam_yubico: Information disclosure in check_user_token in util.c
-
Red Hat All currently supported Red Hat productsnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
1.42% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 8.2 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:P/I:N/A:P |
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
github.com
/Yubico/yubico-pam/commit/0f6ceabab0a8849b47f67d727aa526c2656089ba
patch
-
bugzilla.opensuse.org
/show_bug.cgi?id=1088027
issue-tracking, third-party-advisory
-
github.com
/Yubico/yubico-pam/issues/136
issue-tracking, third-party-advisory
Sources
- CVE List CVE-2018-9275
- NVD CVE-2018-9275
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.