CVE-2020-28242

MEDIUM

Asterisk Open Source <13.37.1,16.14.1,17.8.1,18.0.1 - DoS

Title source: llm

Description

An issue was discovered in Asterisk Open Source 13.x before 13.37.1, 16.x before 16.14.1, 17.x before 17.8.1, and 18.x before 18.0.1 and Certified Asterisk before 16.8-cert5. If Asterisk is challenged on an outbound INVITE and the nonce is changed in each response, Asterisk will continually send INVITEs in a loop. This causes Asterisk to consume more and more memory since the transaction will never terminate (even if the call is hung up), ultimately leading to a restart or shutdown of Asterisk. Outbound authentication must be configured on the endpoint for this to occur.

References (3)

Core 3

Core References

Vendor Advisory x_refsource_misc

http://downloads.asterisk.org/pub/security/AST-2020-002.html

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QUS54QTQCYKR36EIULYD544GXDA644HB/

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html

Scores

CVSS v3 6.5

EPSS 0.0154

EPSS Percentile 71.6%

Attack Vector NETWORK

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

Details

CWE

CWE-674

Status published

Products (4)

asterisk/certified_asterisk < 16.8.0

debian/debian_linux 9.0

fedoraproject/fedora 33

sangoma/asterisk 13.0 - 13.37.1

Published Nov 06, 2020

Tracked Since Feb 18, 2026