Debian dsa-6510 : xdg-dbus-proxy - security update

critical Nessus Plugin ID 349467

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Synopsis

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

Description

The remote Debian 13 host has packages installed that are affected by a vulnerability as referenced in the dsa-6510 advisory.

- ------------------------------------------------------------------------- Debian Security Advisory DSA-6510-1 [email protected] https://www.debian.org/security/ Alberto Garcia September 23, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : xdg-dbus-proxy CVE ID : CVE-2026-94422 Debian Bug : 1148782

It was discovered that an incorrect implementation of message filtering in xdg-dbus-proxy allows an attacker to bypass the intended message filtering on the D-Bus session bus by setting a reply serial number on non-reply messages.

A malicious or compromised Flatpak app could achieve arbitrary code execution outside its sandbox.

If other app frameworks rely on xdg-dbus-proxy in the same way that Flatpak does, then they will have an equivalent vulnerability until xdg-dbus-proxy is updated.

For the stable distribution (trixie), this problem has been fixed in version 0.1.6-1+deb13u3.

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 Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/

Mailing list: [email protected]

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.

Plugin Details

Severity: Critical

ID: 349467

File Name: debian_DSA-6510.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 9/23/2026

Updated: 9/23/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.53

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2026-94422

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:xdg-dbus-proxy-tests, p-cpe:/a:debian:debian_linux:xdg-dbus-proxy

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/23/2026

Vulnerability Publication Date: 9/23/2026

Reference Information

CVE: CVE-2026-94422

Detections

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