Path traversal in Asterisk

1) Path traversal

EUVDB-ID: #VU102519

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 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

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 - 20.7-cert3

CPE2.3

• cpe:2.3:a:sangoma_technologies_corporation:asterisk:18.26.0:*:*:*:*:*:*:*
• cpe:2.3:a:sangoma_technologies_corporation:asterisk:20.11.0:*:*:*:*:*:*:*
• cpe:2.3:a:sangoma_technologies_corporation:asterisk:21.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:digium_linux_support_services:certified_asterisk:18.9-cert12:*:*:*:*:rv110w_wireless-n_vpn_firewall:*:*
• cpe:2.3:a:digium_linux_support_services:certified_asterisk:20.7-cert3:*:*:*:*:rv110w_wireless-n_vpn_firewall:*:*

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

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.