Debian dla-4326 : asterisk - security update

high Nessus Plugin ID 269985

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Synopsis

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

Description

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4326 advisory.

------------------------------------------------------------------------- Debian LTS Advisory DLA-4326-1 [email protected] https://www.debian.org/lts/security/ Markus Koschany October 10, 2025 https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : asterisk Version : 1:16.28.0~dfsg-0+deb11u8 CVE ID : CVE-2025-1131 CVE-2025-54995

Two security vulnerabilities have been discovered in Asterisk, an Open Source Private Branch Exchange.

CVE-2025-1131

A local privilege escalation vulnerability exists in the safe_asterisk script included with the Asterisk toolkit package. When Asterisk is started via this script, it sources all .sh files located in /etc/asterisk/startup.d/ as root, without validating ownership or permissions. Non-root users with legitimate write access to /etc/asterisk can exploit this behaviour by placing malicious scripts in the startup.d directory, which will then execute with root privileges upon service restart. Default Debian installations are not affected by this problem.

CVE-2025-54995

Prior to this version, RTP UDP ports and internal resources can leak due to a lack of session termination. This could result in resource exhaustion.

For Debian 11 bullseye, these problems have been fixed in version 1:16.28.0~dfsg-0+deb11u8.

We recommend that you upgrade your asterisk packages.

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

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 Attachment:
signature.asc Description: This is a digitally signed message part

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 asterisk packages.

Plugin Details

Severity: High

ID: 269985

File Name: debian_DLA-4326.nasl

Version: 1.1

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 10/10/2025

Updated: 10/10/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2025-1131

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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:P/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7

Threat Score: 5.7

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:asterisk-modules, p-cpe:/a:debian:debian_linux:asterisk-dahdi, p-cpe:/a:debian:debian_linux:asterisk-mysql, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:asterisk-mobile, p-cpe:/a:debian:debian_linux:asterisk-ooh323, p-cpe:/a:debian:debian_linux:asterisk-dev, p-cpe:/a:debian:debian_linux:asterisk-voicemail-odbcstorage, p-cpe:/a:debian:debian_linux:asterisk-voicemail-imapstorage, p-cpe:/a:debian:debian_linux:asterisk-vpb, p-cpe:/a:debian:debian_linux:asterisk-mp3, p-cpe:/a:debian:debian_linux:asterisk-config, p-cpe:/a:debian:debian_linux:asterisk-tests, p-cpe:/a:debian:debian_linux:asterisk-voicemail, p-cpe:/a:debian:debian_linux:asterisk, p-cpe:/a:debian:debian_linux:asterisk-doc

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: 10/10/2025

Vulnerability Publication Date: 8/28/2025

Reference Information

CVE: CVE-2025-1131, CVE-2025-54995

Detections

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