CVE-2021-32558

HIGH

Asterisk DoS via IAX2 Unsupported Media Format Packet

Title source: llm

Description

An issue was discovered in Sangoma Asterisk 13.x before 13.38.3, 16.x before 16.19.1, 17.x before 17.9.4, and 18.x before 18.5.1, and Certified Asterisk before 16.8-cert10. If the IAX2 channel driver receives a packet that contains an unsupported media format, a crash can occur.

References (6)

Core 6

Core References

Mailing List, Patch, Third Party Advisory mailing-list x_refsource_fulldisc

http://seclists.org/fulldisclosure/2021/Jul/49

Patch, Third Party Advisory, VDB Entry x_refsource_misc

http://packetstormsecurity.com/files/163639/Asterisk-Project-Security-Advisory-AST-2021-008.html

Patch, Vendor Advisory x_refsource_misc

https://downloads.asterisk.org/pub/security/AST-2021-008.html

Exploit, Issue Tracking, Patch, Vendor Advisory x_refsource_misc

https://issues.asterisk.org/jira/browse/ASTERISK-29392

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2021/08/msg00005.html

Third Party Advisory vendor-advisory x_refsource_debian

https://www.debian.org/security/2021/dsa-4999

Scores

CVSS v3 7.5

EPSS 0.0911

EPSS Percentile 94.7%

Attack Vector NETWORK

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

Details

CWE

CWE-74

Status published

Products (4)

debian/debian_linux 9.0

debian/debian_linux 11.0

digium/asterisk 13.0.0 - 13.38.3

digium/certified_asterisk 16.8 (17 CPE variants)

Published Jul 30, 2021

Tracked Since Feb 18, 2026