Main Vulnerability Database Vulnerabilities #VU96902

NULL pointer dereference in Asterisk Open Source and Certified Asterisk - CVE-2024-42491

Published: September 5, 2024

Vulnerability identifier: #VU96902

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2024-42491

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when handling malformed Contact or Record-Route URI in an incoming SIP request. A remote attacker can send a specially crafted SIP request to the server and perform a denial of service (DoS) attack.

Affected software

Asterisk Open Source
Certified Asterisk

How to mitigate CVE-2024-42491

Install updates from vendor's website.

Asterisk Open Source - addressed in versions 18.24.3, 20.9.3, 21.4.3
Certified Asterisk - addressed in versions 18.9-cert12, 20.7-cert3

External References

https://github.com/asterisk/asterisk/security/advisories/GHSA-v428-g3cw-7hv9

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