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Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS / 22.04 LTS : PAM vulnerability (USN-5825-1)

critical Nessus Plugin ID 170644

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS / 22.04 LTS / 22.10 host has packages installed that are affected by a vulnerability as referenced in the USN-5825-1 advisory.

 - 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. (CVE-2022-28321)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-5825-1

Plugin Details

Severity: Critical

ID: 170644

File Name: ubuntu_USN-5825-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 1/25/2023

Updated: 10/16/2023

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2022-28321

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:esm, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libpam-cracklib, p-cpe:/a:canonical:ubuntu_linux:libpam-modules, p-cpe:/a:canonical:ubuntu_linux:libpam-modules-bin, p-cpe:/a:canonical:ubuntu_linux:libpam-runtime, p-cpe:/a:canonical:ubuntu_linux:libpam0g, p-cpe:/a:canonical:ubuntu_linux:libpam0g-dev

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 1/25/2023

Vulnerability Publication Date: 9/19/2022

Reference Information

CVE: CVE-2022-28321

USN: 5825-1