Privilege escalation in Asterisk
CVE-2024-42365
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.
EPSS: 0.047 (90.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L.
Affected products
- Asterisk — versions 21.4.0, >= 19.0, < 20.7-cert2, < 18.24.2
- Asterisk Certified_asterisk — versions 13.13.0, 16.8, 16.8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (Vendor Advisory, Technical Description, x_refsource_CONFIRM, Exploit)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (x_refsource_MISC, Issue Tracking)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2024-42365?
- CVE-2024-42365 is a high-severity vulnerability in Asterisk, classified under Privilege Defined With Unsafe Actions. CVSS score: 7.4/10. Published 2024-08-08.
- How severe is CVE-2024-42365?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2024-42365 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.