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CVE-2022-28321

Published: 19 September 2022

The Linux-PAM package before 1.5.2-6.1 for openSUSE Tumbleweed allows authentication bypass for SSH logins. The pam_access.so module doesn't correctly restrict login if a user tries to connect from an IP address that is not resolvable via DNS. In such conditions, a user with denied access to a machine can still get access. NOTE: the relevance of this issue is largely limited to openSUSE Tumbleweed and openSUSE Factory; it does not affect Linux-PAM upstream.

Notes

AuthorNote
rodrigo-zaiden
it was stated that upstream is not affected, so, Ubuntu
might not be affected as well, it worth checking

Priority

Negligible

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
pam
Launchpad, Ubuntu, Debian
bionic
Released (1.1.8-3.6ubuntu2.18.04.4)
focal
Released (1.3.1-5ubuntu4.4)
jammy
Released (1.4.0-11ubuntu2.1)
kinetic
Released (1.5.2-2ubuntu1.1)
lunar Needs triage

trusty
Released (1.1.8-1ubuntu2.2+esm1)
upstream Needs triage

xenial
Released (1.1.8-3.2ubuntu2.3+esm2)

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