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CVE-2016-4422

Published: 6 May 2016

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.

Notes

AuthorNote
sbeattie
simplified fix in oss-security posting

Priority

High

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
libpam-sshauth
Launchpad, Ubuntu, Debian
upstream
Released (0.4.1-2)
precise Ignored
(end of life)
trusty
Released (0.3.1-1deb8u1build0.14.04.1)
wily
Released (0.3.1-1ubuntu0.15.10.1)
xenial
Released (0.3.1-1ubuntu2)
yakkety Not vulnerable
(0.4.1-2)
zesty Not vulnerable
(0.4.1-2)
Patches:
upstream: https://bazaar.launchpad.net/~ltsp-upstream/ltsp/libpam-sshauth/revision/114

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H