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Debian dla-3602 : libx11-6 - security update

high Nessus Plugin ID 182584

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3602 advisory.

 - ------------------------------------------------------------------------- Debian LTS Advisory DLA-3602-1 [email protected] https://www.debian.org/lts/security/ Emilio Pozuelo Monfort October 05, 2023 https://wiki.debian.org/LTS
 - -------------------------------------------------------------------------

 Package : libx11 Version : 2:1.6.7-1+deb10u4 CVE ID : CVE-2023-43785 CVE-2023-43786 CVE-2023-43787

 Several vulnerabilities were found in libx11, the X11 client-side library.

 CVE-2023-43785

 Gregory James Duck discovered an out of bounds memory access in
 _XkbReadKeySyms, which could result in denial of service.

 CVE-2023-43786

 Yair Mizrahi found an infinite recursion in PutSubImage when parsing a crafted file, which would result in stack exhaustion and denial of service.

 CVE-2023-43787

 Yair Mizrahi discovered an integer overflow in XCreateImage when parsing crafted input, which would result in a small buffer allocation leading into a buffer overflow. This could result in denial of service or potentially in arbitrary code execution.

 For Debian 10 buster, these problems have been fixed in version 2:1.6.7-1+deb10u4.

 We recommend that you upgrade your libx11 packages.

 For the detailed security status of libx11 please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/libx11

 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 these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the libx11-6 packages.

See Also

https://security-tracker.debian.org/tracker/source-package/libx11

https://security-tracker.debian.org/tracker/CVE-2023-43785

https://security-tracker.debian.org/tracker/CVE-2023-43786

https://security-tracker.debian.org/tracker/CVE-2023-43787

https://packages.debian.org/source/buster/libx11

Plugin Details

Severity: High

ID: 182584

File Name: debian_DLA-3602.nasl

Version: 1.4

Type: local

Agent: unix

Published: 10/5/2023

Updated: 1/22/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2023-43787

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libx11-6, cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:libx11-data, p-cpe:/a:debian:debian_linux:libx11-xcb-dev, p-cpe:/a:debian:debian_linux:libx11-doc, p-cpe:/a:debian:debian_linux:libx11-xcb1, p-cpe:/a:debian:debian_linux:libx11-dev

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 10/5/2023

Vulnerability Publication Date: 10/5/2023

Reference Information

CVE: CVE-2023-43785, CVE-2023-43786, CVE-2023-43787