#VU102519 Path traversal in Asterisk and Certified Asterisk - CVE-2024-53566

Vulnerability identifier: #VU102519

Vulnerability risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2024-53566

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Asterisk
Server applications / Frameworks for developing and running applications
Certified Asterisk
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: Sangoma Technologies Corporation
Digium (Linux Support Services)

Description

The vulnerability allows a remote user to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences within AMI ListCategories. A remote administrator can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Asterisk: 18.26.0 - 22.1.0

Certified Asterisk: 18.9-cert1 - 18.9-cert12, 20.7-cert1 - 20.7-cert3

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External links
https://gist.github.com/hyp164D1/e7c0f44ffb38c00320aa1a6d98bee616
https://github.com/asterisk/asterisk/blob/22/main/manager.c#L2556
https://github.com/asterisk/asterisk/security/advisories/GHSA-33x6-fj46-6rfh

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.