Debian dsa-6469 : xrdp - security update

critical Nessus Plugin ID 341057

Synopsis

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

Description

The remote Debian 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6469 advisory.

- ------------------------------------------------------------------------- Debian Security Advisory DSA-6469-1 [email protected] https://www.debian.org/security/ Aron Xu August 27, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : xrdp CVE ID : CVE-2026-32105 CVE-2026-32107 CVE-2026-32623 CVE-2026-32624 CVE-2026-33145 CVE-2026-33516 CVE-2026-33689 CVE-2026-35512 CVE-2026-41252 CVE-2026-41521 CVE-2026-42218 CVE-2026-44178 CVE-2026-44978 CVE-2026-54538 CVE-2026-55238 CVE-2026-55639 CVE-2026-55645 Debian Bug : 1134339

Multiple vulnerabilities were discovered in xrdp, a Remote Desktop Protocol (RDP) server, which may result in denial of service, information disclosure, privilege escalation or the execution of arbitrary code. Several of these issues are exploitable by an unauthenticated remote attacker.

This update also changes two defaults, as part of the fixes:

* Alternate shells supplied by the client are now rejected unless AllowAlternateShell is explicitly enabled in /etc/xrdp/sesman.ini.
This is the fix for CVE-2026-33145 and applies even on systems with a locally modified sesman.ini.

* The generic VNC proxy session type [vnc-any] is now commented out in /etc/xrdp/xrdp.ini. It was reachable before authentication and exposed CVE-2026-41252 and CVE-2026-41521 to unauthenticated clients. Administrators who need it should re-enable it and restrict it to specific hosts and ports.

For the stable distribution (trixie), these problems have been fixed in version 0.10.1-3.1+deb13u2.

We recommend that you upgrade your xrdp packages.

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

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

Solution

Upgrade the xrdp packages.

Plugin Details

Severity: Critical

ID: 341057

File Name: debian_DSA-6469.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 8/27/2026

Updated: 8/27/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 97

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2026-41521

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 7.9

Threat Vector: CVSS:4.0/E:U

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

CVSS Score Source: CVE-2026-32105

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:xrdp

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/27/2026

Vulnerability Publication Date: 4/17/2026

Reference Information

CVE: CVE-2026-32105, CVE-2026-32107, CVE-2026-32623, CVE-2026-32624, CVE-2026-33145, CVE-2026-33516, CVE-2026-33689, CVE-2026-35512, CVE-2026-41252, CVE-2026-41521, CVE-2026-42218, CVE-2026-44178, CVE-2026-44978, CVE-2026-54538, CVE-2026-55238, CVE-2026-55639, CVE-2026-55645

Detections

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