SUSE SLES12 Security Update : libssh (SUSE-SU-2026:3302-1)

medium Nessus Plugin ID 330559

Synopsis

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

Description

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3302-1 advisory.

This update for libssh fixes the following issues

- CVE-2026-3731: denial of service via out-of-bounds read in SFTP extension name handler (bsc#1259377).
- CVE-2026-59843: denial of service via zero advertised channel packet size (bsc#1272164).
- CVE-2026-59844: denial of service via oversized SFTP read length (bsc#1272165).
- CVE-2026-59845: denial of service via unchecked ProxyCommand fork() failure (bsc#1272166).
- CVE-2026-59846: information disclosure via ProxyCommand %r username expansion (bsc#1272167).
- CVE-2026-59847: integrity downgrade via OpenSSL AES-GCM tag verification (bsc#1272168).
- CVE-2026-59848: denial of service via SFTP responses with unknown request IDs (bsc#1272169).
- CVE-2026-59850: use-after-free via data callbacks on closed channels (bsc#1272171).

Tenable has extracted the preceding description block directly from the SUSE 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

Update the affected libssh-config, libssh-devel, libssh4 and / or libssh4-32bit packages.

Plugin Details

Severity: Medium

ID: 330559

File Name: suse_SU-2026-3302-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 7/29/2026

Updated: 7/29/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.3

Percentile: 51.07

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-3731

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:12, p-cpe:/a:novell:suse_linux:libssh-config, p-cpe:/a:novell:suse_linux:libssh-devel, p-cpe:/a:novell:suse_linux:libssh4-32bit, p-cpe:/a:novell:suse_linux:libssh4

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/27/2026

Vulnerability Publication Date: 2/19/2026

Reference Information

CVE: CVE-2026-3731, CVE-2026-59843, CVE-2026-59844, CVE-2026-59845, CVE-2026-59846, CVE-2026-59847, CVE-2026-59848, CVE-2026-59850

IAVA: 2026-A-0166

SuSE: SUSE-SU-2026:3302-1

Detections

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