CVE-2020-28242

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 06-11-2020 07:15

Last modified: - 05-06-2022 05:11

Total changes: - 4

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.

Common Vulnerability Scoring System (CVSS)

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

Low

Attack complexity

Network

Attack vector

High

Availability

None

Confidentiality

None

Integrity

Low

Privileges required

Unchanged

Scope

None

User interaction

6.5

Base score

2.8

3.6

Exploitability score

Impact score

Verification logic

vendor=asterisk AND product=open_source AND versionStartIncluding=18.0 AND versionEndExcluding=18.0.1

vendor=asterisk AND product=open_source AND versionStartIncluding=17.0 AND versionEndExcluding=17.8.1

vendor=asterisk AND product=open_source AND versionStartIncluding=16.0 AND versionEndExcluding=16.14.1

vendor=asterisk AND product=open_source AND versionStartIncluding=13.0 AND versionEndExcluding=13.37.1

vendor=asterisk AND product=certified_asterisk AND versionEndIncluding=16.8.0

vendor=fedoraproject AND product=fedora AND version=33

vendor=Debian AND product=debian_linux AND version=9.0

Reference

http://downloads.asterisk.org/pub/security/AST-2020-002.html
FEDORA-2020-6b277646c7-Mailing List, Third Party Advisory
[debian-lts-announce] 20220403 [SECURITY] [DLA 2969-1] asterisk security update-Mailing List, Third Party Advisory

Keywords

CVE-2020-28242

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2020-28242

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures