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Debian dla-4278 : libmupdf-dev - security update

medium Nessus Plugin ID 253666

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Synopsis

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

Description

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4278 advisory.

 - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4278-1 [email protected] https://www.debian.org/lts/security/ Chris Lamb August 22, 2025 https://wiki.debian.org/LTS
 - -------------------------------------------------------------------------

 Package : mupdf Version : 1.17.0+ds1-2+deb11u1 CVE ID : CVE-2020-21896

 It was discovered that there was a potential use after free vulnerability in mupdf, a lightweight PDF viewer. This could have allowed remote attackers to cause a denial of service attack when opening a maliciously-crafted PDF file.

 For Debian 11 bullseye, this problem has been fixed in version 1.17.0+ds1-2+deb11u1.

 We recommend that you upgrade your mupdf packages.

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

 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 libmupdf-dev packages.

See Also

https://security-tracker.debian.org/tracker/source-package/mupdf

https://security-tracker.debian.org/tracker/CVE-2020-21896

https://packages.debian.org/source/bullseye/mupdf

Plugin Details

Severity: Medium

ID: 253666

File Name: debian_DLA-4278.nasl

Version: 1.1

Type: local

Agent: unix

Published: 8/22/2025

Updated: 8/22/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.8

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

CVSS Score Source: CVE-2020-21896

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:mupdf, p-cpe:/a:debian:debian_linux:libmupdf-dev, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:mupdf-tools

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: 8/22/2025

Vulnerability Publication Date: 8/22/2023

Reference Information

CVE: CVE-2020-21896