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Fencer Vulns
high 7.4

CVE-2024-42365 json

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

published 2024-08-08 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-39574

cvss
7.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
4.7%
EPSS 4.7% chance of exploitation in 30 days, percentile 91%
public exploits
1
Metasploit

Summary

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.

Patch / fix

  • asterisk asterisk 18.24.2, 20.9.2, 21.4.2
  • asterisk certified_asterisk 18.9-cert11, 20.7-cert2
  • asterisk Debian 14 1:20.9.3~dfsg+~cs6.14.60671435-1

debian advisories DEBIAN-CVE-2024-42365

  • asterisk Alpine 3.18, Alpine 3.17 18.24.3-r0
  • asterisk Alpine 3.19 20.9.3-r0
  • asterisk Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 20.9.2-r0

alpine advisories ALPINE-CVE-2024-42365

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-42365 updated cvss 8.8

asterisk: Write=originate, is sufficient permissions for code execution / System dialplan

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (Metasploit exploit/linux/misc/asterisk_ami_originate_auth_rce)
  2. Published

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

4.70% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.1 7.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • asterisk asterisk
  • asterisk certified_asterisk

Classification

Weakness
  • CWE-267 Privilege Defined With Unsafe Actions
  • CWE-1220 Insufficient Granularity of Access Control

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.