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Debian dla-4542 : xdg-dbus-proxy - security update

medium Nessus Plugin ID 307902

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-4542 advisory.

 - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4542-1 [email protected] https://www.debian.org/lts/security/ Emilio Pozuelo Monfort April 21, 2026 https://wiki.debian.org/LTS
 - -------------------------------------------------------------------------

 Package : xdg-dbus-proxy Version : 0.1.2-2+deb11u1 CVE ID : CVE-2026-34080 Debian Bug : 1132939

 It was discovered that incorrect parsing of policy rules in the xdg-dbus-proxy (a filtering proxy for D-Bus connections) allowed the bypass of eavesdrop restrictions, which could result in information disclosure.

 For Debian 11 bullseye, this problem has been fixed in version 0.1.2-2+deb11u1.

 We recommend that you upgrade your xdg-dbus-proxy packages.

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

 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 xdg-dbus-proxy packages.

See Also

http://www.nessus.org/u?b1ce1ba6

https://security-tracker.debian.org/tracker/CVE-2026-34080

https://packages.debian.org/source/bullseye/xdg-dbus-proxy

Plugin Details

Severity: Medium

ID: 307902

File Name: debian_DLA-4542.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/21/2026

Updated: 4/21/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2026-34080

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.8

Threat Score: 4.3

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:xdg-dbus-proxy, p-cpe:/a:debian:debian_linux:xdg-dbus-proxy-tests

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/21/2026

Vulnerability Publication Date: 4/7/2026

Reference Information

CVE: CVE-2026-34080