Asterisk allows `Write=originate` as sufficient permissions for code execution / `System()` dialplan

Description

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.

Scores

EPSS (exploitation in 30 days)

4.7% · top 8.1% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.

Weakness

• CWE-267: Privilege Defined With Unsafe Actions (opens in a new tab)All about CWE-267 and its CVEs
• CWE-1220: Insufficient Granularity of Access Control (opens in a new tab)All about CWE-1220 and its CVEs

Affected products

• asterisk · asterisk

  • affected < 18.24.2
  • affected >= 19.0.0, < 20.9.2
  • affected >= 21.0.0, < 21.4.2
  • affected < 18.9-cert11
  • affected >= 19.0, < 20.7-cert2

References (9)

• https://github.com/asterisk/asterisk/security/advisories/GHSA-c4cg-9275-6w44 (opens in a new tab)x_refsource_CONFIRM
• https://github.com/asterisk/asterisk/commit/42a2f4ccfa2c7062a15063e765916b3332e34cc4 (opens in a new tab)x_refsource_MISC
• https://github.com/asterisk/asterisk/commit/7a0090325bfa9d778a39ae5f7d0a98109e4651c8 (opens in a new tab)x_refsource_MISC
• https://github.com/asterisk/asterisk/commit/b4063bf756272254b160b6d1bd6e9a3f8e16cc71 (opens in a new tab)x_refsource_MISC
• https://github.com/asterisk/asterisk/commit/bbe68db10ab8a80c29db383e4dfe14f6eafaf993 (opens in a new tab)x_refsource_MISC
• https://github.com/asterisk/asterisk/commit/faddd99f2b9408b524e5eb8a01589fe1fa282df2 (opens in a new tab)x_refsource_MISC
• https://github.com/asterisk/asterisk/blob/14367caaf7241df1eceea7c45c5b261989c2c6db/main/manager.c#L6426 (opens in a new tab)x_refsource_MISC
• https://github.com/asterisk/asterisk/blob/7d28165cb1b2d02d66e8693bd3fe23ee72fc55d8/main/manager.c#L6426 (opens in a new tab)x_refsource_MISC
• https://lists.debian.org/debian-lts-announce/2024/10/msg00016.html (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2024-42365](https://trackcve.app/badge/CVE-2024-42365.svg)](https://trackcve.app/cve/CVE-2024-42365)

Record last updated 3 Nov 2025, 22:04 UTC.