CVE-2021-46837

 

Published at: - 30-08-2022 09:15

Last modified: - 28-01-2023 02:20

Total changes: - 6

Description

res_pjsip_t38 in Sangoma Asterisk 16.x before 16.16.2, 17.x before 17.9.3, and 18.x before 18.2.2, and Certified Asterisk before 16.8-cert7, allows an attacker to trigger a crash by sending an m=image line and zero port in a response to a T.38 re-invite initiated by Asterisk. This is a re-occurrence of the CVE-2019-15297 symptoms but not for exactly the same reason. The crash occurs because there is an append operation relative to the active topology, but this should instead be a replace operation.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://downloads.asterisk.org/pub/security/AST-2021-006.html
• [debian-lts-announce] 20221117 [SECURITY] [DLA 3194-1] asterisk security update-Mailing List, Third Party Advisory
• DSA-5285-Third Party Advisory

 

Keywords

NVD

 

CVE-2021-46837

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures