Debian DSA-5409-1 : libssh - security update

medium Nessus Plugin ID 176333

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5409 advisory.

Two security issues have been discovered in libssh, a tiny C SSH library: CVE-2023-1667 Philip Turnbull discovered a NULL pointer dereference which could result in denial of service. CVE-2023-2283 Kevin Backhouse discovered that pki_verify_data_signature() may fail to correctly validate authentication in memory pressure situations. For the stable distribution (bullseye), these problems have been fixed in version 0.9.7-0+deb11u1. We recommend that you upgrade your libssh packages. For the detailed security status of libssh please refer to its security tracker page at: https://security- tracker.debian.org/tracker/libssh

Tenable has extracted the preceding description block directly from the Debian security advisory.

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

Solution

Upgrade the libssh packages.

For the stable distribution (bullseye), these problems have been fixed in version 0.9.7-0+deb11u1.

Plugin Details

Severity: Medium

ID: 176333

File Name: debian_DSA-5409.nasl

Version: 1.5

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 5/24/2023

Updated: 1/24/2025

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

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

CVSS Score Source: CVE-2023-2283

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:libssh-gcrypt-4, p-cpe:/a:debian:debian_linux:libssh-doc, p-cpe:/a:debian:debian_linux:libssh-gcrypt-dev, p-cpe:/a:debian:debian_linux:libssh-dev, p-cpe:/a:debian:debian_linux:libssh-4

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/23/2023

Vulnerability Publication Date: 5/11/2023

Reference Information

CVE: CVE-2023-1667, CVE-2023-2283

IAVA: 2023-A-0517-S

Detections

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