Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | libpam-sshauth | 0.3.1-1+deb8u1 | DSA-3567-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | libpam-sshauth | 0.3.1-1ubuntu2 | — |
| Ubuntu 14.04 LTS | libpam-sshauth | 0.3.1-1deb8u1build0.14.04.1 | — |
Advisories 1
- DSA-3567-1 libpam-sshauth - security update Debian Security (DSA / DLA) · Mar 9, 2026