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CBL Mariner 2.0 Security Update: libssh (CVE-2025-5351)

medium Nessus Plugin ID 242392

Synopsis

The remote CBL Mariner host is missing one or more security updates.

Description

The version of libssh installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-5351 advisory.

 - A flaw was found in the key export functionality of libssh. The issue occurs in the internal function responsible for converting cryptographic keys into serialized formats. During error handling, a memory structure is freed but not cleared, leading to a potential double free issue if an additional failure occurs later in the function. This condition May result in heap corruption or application instability in low-memory scenarios, posing a risk to system reliability where key export operations are performed.
 (CVE-2025-5351)

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://nvd.nist.gov/vuln/detail/CVE-2025-5351

Plugin Details

Severity: Medium

ID: 242392

File Name: mariner_CVE-2025-5351.nasl

Version: 1.1

Type: local

Published: 7/19/2025

Updated: 7/19/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.0

CVSS v2

Risk Factor: Low

Base Score: 3.6

Temporal Score: 2.7

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

CVSS Score Source: CVE-2025-5351

CVSS v3

Risk Factor: Medium

Base Score: 4.2

Temporal Score: 3.7

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

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

Vulnerability Information

CPE: p-cpe:/a:microsoft:cbl-mariner:libssh-devel, p-cpe:/a:microsoft:cbl-mariner:libssh-debuginfo, p-cpe:/a:microsoft:cbl-mariner:libssh-config, x-cpe:/o:microsoft:cbl-mariner, p-cpe:/a:microsoft:cbl-mariner:libssh

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/8/2025

Vulnerability Publication Date: 7/3/2025

Reference Information

CVE: CVE-2025-5351

IAVA: 2025-A-0462