Debian DSA-5409-1 : libssh - security update

medium Nessus Plugin ID 176333


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


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

- NULL pointer dereference during rekeying with algorithm guessing [fedora-all] (CVE-2023-1667)

- authorization bypass in pki_verify_data_signature [fedora-all] (CVE-2023-2283)

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


Upgrade the libssh packages.

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

See Also

Plugin Details

Severity: Medium

ID: 176333

File Name: debian_DSA-5409.nasl

Version: 1.4

Type: local

Agent: unix

Published: 5/24/2023

Updated: 12/22/2023

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

Risk Information


Risk Factor: Low

Score: 3.6


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


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

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

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