A local privilege escalation vulnerability exists in the safe_asterisk script included with the Asterisk toolkit package. When Asterisk is started via this script (common in SysV init or FreePBX environments), 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.

The remote host is affected by the vulnerability described in GLSA-202601-04 (Asterisk: Multiple Vulnerabilities)

    Multiple vulnerabilities have been discovered in Asterisk. Please review the CVE identifiers referenced     below for details.

Tenable has extracted the preceding description block directly from the Gentoo Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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                debian-lts@lists.debian.org     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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A local privilege escalation vulnerability exists in the safe_asterisk script included with the Asterisk     toolkit package. When Asterisk is started via this script (common in SysV init or FreePBX environments),     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. (CVE-2025-1131)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
296592	GLSA-202601-04 : Asterisk: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	high
269985	Debian dla-4326 : asterisk - security update	Nessus	Debian Local Security Checks	high
266045	Linux Distros Unpatched Vulnerability : CVE-2025-1131	Nessus	Misc.	high

Detections

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CVE-2025-1131

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Tenable Plugins

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