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GLSA-202105-35 : OpenSSH: Multiple vulnerabilities

high Nessus Plugin ID 157020

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Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-202105-35 (OpenSSH: Multiple vulnerabilities)

 Multiple vulnerabilities have been discovered in OpenSSH. Please review the CVE identifiers referenced below for details.
 Impact :

 A remote attacker, able to access the socket of the forwarding agent, might be able to execute arbitrary code with the privileges of the process or cause a Denial of Service condition.
 Furthermore, a remote attacker might conduct a man-in-the-middle attack targeting initial connection attempts where no host key for the server has been cached by client yet.
 Workaround :

 There is no known workaround at this time.

Solution

All OpenSSH users should upgrade to the latest version:
 # emerge --sync # emerge --ask --oneshot --verbose '>=net-misc/openssh-8.5_p1'

See Also

https://security.gentoo.org/glsa/202105-35

Plugin Details

Severity: High

ID: 157020

File Name: gentoo_GLSA-202105-35.nasl

Version: 1.2

Type: local

Published: 1/24/2022

Updated: 1/26/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: CVSS2#AV:N/AC:H/Au:S/C:P/I:P/A:P

CVSS Score Source: CVE-2021-28041

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

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

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

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:openssh, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Ease: No known exploits are available

Patch Publication Date: 5/26/2021

Vulnerability Publication Date: 6/29/2020

Reference Information

CVE: CVE-2020-14145, CVE-2021-28041

GLSA: 202105-35