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AlmaLinux 8 : openssh (ALSA-2021:4368)

medium Nessus Plugin ID 157667

Synopsis

The remote AlmaLinux host is missing a security update.

Description

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2021:4368 advisory.

 - The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). NOTE: some reports state that 8.5 and 8.6 are also affected. (CVE-2020-14145)

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://errata.almalinux.org/8/ALSA-2021-4368.html

Plugin Details

Severity: Medium

ID: 157667

File Name: alma_linux_ALSA-2021-4368.nasl

Version: 1.3

Type: local

Published: 2/9/2022

Updated: 2/14/2022

Supported Sensors: Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2020-14145

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: p-cpe:/a:alma:linux:openssh-clients, p-cpe:/a:alma:linux:openssh, p-cpe:/a:alma:linux:openssh-server, p-cpe:/a:alma:linux:openssh-askpass, p-cpe:/a:alma:linux:openssh-ldap, p-cpe:/a:alma:linux:openssh-keycat, p-cpe:/a:alma:linux:pam_ssh_agent_auth, cpe:/o:alma:linux:8, p-cpe:/a:alma:linux:openssh-cavs

Required KB Items: Host/local_checks_enabled, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 11/9/2021

Vulnerability Publication Date: 6/29/2020

Reference Information

CVE: CVE-2020-14145