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CBL Mariner 2.0 Security Update: python3 (CVE-2025-4516)

medium Nessus Plugin ID 242355

Synopsis

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

Description

The version of python3 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-2025-4516 advisory.

 - There is an issue in CPython when using `bytes.decode(unicode_escape, error=ignore|replace)`. If you are not using the unicode_escape encoding or an error handler your usage is not affected. To work-around this issue you May stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError. (CVE-2025-4516)

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-2025-4516

Plugin Details

Severity: Medium

ID: 242355

File Name: mariner_CVE-2025-4516.nasl

Version: 1.1

Type: local

Published: 7/19/2025

Updated: 7/19/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

CVSS Score Source: CVE-2025-4516

CVSS v3

Risk Factor: Medium

Base Score: 5.1

Temporal Score: 4.5

Vector: CVSS:3.0/AV:L/AC:H/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: 5.9

Threat Score: 2

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: p-cpe:/a:microsoft:cbl-mariner:python3-libs, p-cpe:/a:microsoft:cbl-mariner:python3-test, x-cpe:/o:microsoft:cbl-mariner, p-cpe:/a:microsoft:cbl-mariner:python3, p-cpe:/a:microsoft:cbl-mariner:python3-pip, p-cpe:/a:microsoft:cbl-mariner:python3-curses, p-cpe:/a:microsoft:cbl-mariner:python3-devel, p-cpe:/a:microsoft:cbl-mariner:python3-tools, p-cpe:/a:microsoft:cbl-mariner:python3-debuginfo, p-cpe:/a:microsoft:cbl-mariner:python3-setuptools

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: 5/15/2025

Reference Information

CVE: CVE-2025-4516