CVE-2016-4422 json
The pam_sm_authenticate function in pam_sshauth.c in libpam-sshauth might allow context-dependent attackers to bypass authentication or gai…
published 2016-05-06 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-5422
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 78%
- public exploits
- 0
- none known
Summary
The pam_sm_authenticate function in pam_sshauth.c in libpam-sshauth might allow context-dependent attackers to bypass authentication or gain privileges via a system user account.
Patch / fix
- libpam-sshauth Ubuntu 14.04 LTS 0.3.1-1deb8u1build0.14.04.1
- libpam-sshauth Ubuntu 16.04 LTS 0.3.1-1ubuntu2
ubuntu advisories UBUNTU-CVE-2016-4422
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Exploit prediction
1.80% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
debian.org
/security/2016/dsa-3567
vendor-advisory, third-party-advisory
-
bazaar.launchpad.net
/~ltsp-upstream/ltsp/libpam-sshauth/revision/114#src/pam_sshauth.c
broken-link
Sources
- CVE List CVE-2016-4422
- NVD CVE-2016-4422
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.