CentOS 8 : libssh (CESA-2024:3233)

medium Nessus Plugin ID 197683


The remote CentOS host is missing one or more security updates.


The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2024:3233 advisory.

- A flaw was found in libssh. By utilizing the ProxyCommand or ProxyJump feature, users can exploit unchecked hostname syntax on the client. This issue may allow an attacker to inject malicious code into the command of the features mentioned through the hostname parameter. (CVE-2023-6004)

- A flaw was found in the libssh implements abstract layer for message digest (MD) operations implemented by different supported crypto backends. The return values from these were not properly checked, which could cause low-memory situations failures, NULL dereferences, crashes, or usage of the uninitialized memory as an input for the KDF. In this case, non-matching keys will result in decryption/integrity failures, terminating the connection. (CVE-2023-6918)

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


Update the affected libssh, libssh-config and / or libssh-devel packages.

See Also


Plugin Details

Severity: Medium

ID: 197683

File Name: centos8_RHSA-2024-3233.nasl

Version: 1.0

Type: local

Agent: unix

Published: 5/22/2024

Updated: 5/22/2024

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

Risk Information


Risk Factor: Medium

Score: 4.2


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2023-6004


Risk Factor: Medium

Base Score: 4.8

Temporal Score: 4.2

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

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

Vulnerability Information

CPE: cpe:/o:centos:centos:8-stream, p-cpe:/a:centos:centos:libssh-devel, p-cpe:/a:centos:centos:libssh-config, p-cpe:/a:centos:centos:libssh

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/22/2024

Vulnerability Publication Date: 12/19/2023

Reference Information

CVE: CVE-2023-6004, CVE-2023-6918

IAVA: 2023-A-0703

RHSA: 2024:3233