CVE-2024-42365: Asterisk

High severity, CVSS 8.8. EPSS: 4.7% chance of exploitation in the next 30 days.

Asterisk is an open source private branch exchange (PBX) and telephony toolkit. Prior to asterisk versions 18.24.2, 20.9.2, and 21.4.2 and certified-asterisk versions 18.9-cert11 and 20.7-cert2, an AMI user with `write=originate` may change all configuration files in the `/etc/asterisk/` directory. This occurs because they are able to curl remote files and write them to disk, but are also able to append to existing files using the `FILE` function inside the `SET` application. This issue may result in privilege escalation, remote code execution and/or blind server-side request forgery with arbitrary protocol. Asterisk versions 18.24.2, 20.9.2, and 21.4.2 and certified-asterisk versions 18.9-cert11 and 20.7-cert2 contain a fix for this issue.

Affected products

• Asterisk Asterisk: before 18.24.2 (fixed in 18.24.2); from 19.0.0, before 20.9.1 (fixed in 20.9.1); version 21.4.0 only
• Asterisk Certified Asterisk: version 13.13.0 only; version 16.8 only; version 16.8.0 only; version 18.9 only; version 20.7 only

Published 2024-08-08. Last modified 2026-06-17.