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CVE-2022-28321

Publication date 19 September 2022

Last updated 24 July 2024

Ubuntu priority

Negligible

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
pam 23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic
Fixed 1.5.2-2ubuntu1.1
22.04 LTS jammy
Fixed 1.4.0-11ubuntu2.1
20.04 LTS focal
Fixed 1.3.1-5ubuntu4.4
18.04 LTS bionic
Fixed 1.1.8-3.6ubuntu2.18.04.4
16.04 LTS xenial
14.04 LTS trusty

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Notes

rodrigo-zaiden

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

mdeslaur

This CVE was assigned to a flaw in SUSE-specific code that was part of the upstream PR226, and did not make its way into the the upstream Linux-PAM code. The issue was fixed in PR447, which was included in upstream Linux-PAM 1.5.3. USN-5825-1 and USN-5825-2 added the whole PR447 which fixed a bug, even though the original package didn't contain the vulnerability described in this CVE. Marking lunar, mantic, and noble as not-affected since they do not contain the vulnerable code.

Severity score breakdown

Parameter Value
Base score 9.8 · Critical
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