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

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

Priority

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)
	trusty	Released (1.1.8-1ubuntu2.2+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Needs triage
	xenial	Released (1.1.8-3.2ubuntu2.3+esm2) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	kinetic	Released (1.5.2-2ubuntu1.1)
	lunar	Needed
	mantic	Needed

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

References

Bugs

https://bugzilla.suse.com/show_bug.cgi?id=1197654

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