CVE-2020-28242

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.

CVSS v3.0 6.5 MEDIUM
CVSS v2.0 4.0 MEDIUM

6.5^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:N/I:N/A:P

Exploitability : 8.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
http://downloads.asterisk.org/pub/security/AST-2020-002.html	Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QUS54QTQCYKR36EIULYD544GXDA644HB/	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html	Mailing List Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:asterisk:open_source::::::::
	cpe:2.3:a:asterisk:open_source::::::::
	cpe:2.3:a:asterisk:open_source::::::::
	cpe:2.3:a:asterisk:open_source::::::::
	cpe:2.3:a:asterisk:certified_asterisk::::::::

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Information

Published : 2020-11-05 22:15

Updated : 2022-06-04 20:11

NVD link : CVE-2020-28242

Mitre link : CVE-2020-28242

JSON object : View

CWE

CWE-674

Uncontrolled Recursion

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Products Affected

asterisk

certified_asterisk
open_source

debian

debian_linux

fedoraproject

fedora

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