#VU69511 NULL pointer dereference in Certified Asterisk and Asterisk Open Source - CVE-2021-46837

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Main Vulnerability Database Vulnerabilities #VU69511

#VU69511 NULL pointer dereference in Certified Asterisk and Asterisk Open Source - CVE-2021-46837

Published: November 22, 2022


Vulnerability identifier: #VU69511
Vulnerability risk: Medium
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2021-46837
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Certified Asterisk
Asterisk Open Source
Software vendor:
Digium (Linux Support Services)

Description

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

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can send an m=image line and zero port in a response to a T.38 re-invite initiated by Asterisk and perform a denial of service (DoS) attack.


Remediation

Install updates from vendor's website.

External links