Debian dla-4577 : p7zip-rar - security update

medium Nessus Plugin ID 314236

Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 11 host has a package installed that is affected by a vulnerability as referenced in the dla-4577 advisory.

- ------------------------------------------------------------------------- Debian LTS Advisory DLA-4577-1 [email protected] https://www.debian.org/lts/security/ Sylvain Beucler May 11, 2026 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : p7zip-rar Version : 16.02+really25.00+ds-0+deb11u1 CVE ID : CVE-2025-53816 Debian Bug : 1109494

Jaroslav Lobaevski from GitHub Security Lab discovered a memory corruption vulnerability in the RAR module of p7zip, a now unmaintained fork of 7-Zip, a file archiver handling multiple formats. It is unlikely it could lead to arbitrary code execution, but it may lead to denial of service.

To address this vulnerability, whose fix is unfortunately not isolated, and to remain compatible with the new p7zip package (DLA-4576-1), this update replaces the p7zip code base with 7-Zip v25 (which now supports GNU/Linux natively), slightly modified to make it reasonably compatible with p7zip.

For Debian 11 bullseye, this problem has been fixed in version 16.02+really25.00+ds-0+deb11u1.

We recommend that you upgrade your p7zip-rar packages.

For the detailed security status of p7zip-rar please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/p7zip-rar

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

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

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

Solution

Upgrade the p7zip-rar packages.

Plugin Details

Severity: Medium

ID: 314236

File Name: debian_DLA-4577.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 5/11/2026

Updated: 5/11/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2025-53816

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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:P/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 5.5

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:p7zip-rar

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: 5/11/2026

Vulnerability Publication Date: 7/17/2025

Reference Information

CVE: CVE-2025-53816

Detections

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