CVE-2021-46837

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : 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

References

Link	Resource
https://downloads.asterisk.org/pub/security/AST-2021-006.html	Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html	Mailing List Third Party Advisory
https://www.debian.org/security/2022/dsa-5285	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:-::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert1::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert2::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert3::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert4::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert5::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert6::::::
	cpe:2.3:a:digium:asterisk::::::::
	cpe:2.3:a:digium:asterisk::::::::
	cpe:2.3:a:digium:asterisk::::::::

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:9.0:::::::*
	cpe:2.3:o:debian:debian_linux:10.0:::::::*
	cpe:2.3:o:debian:debian_linux:11.0:::::::*

History

No history.

Information

Published : 2022-08-30 07:15

Updated : 2024-02-28 19:29

NVD link : CVE-2021-46837

Mitre link : CVE-2021-46837

CVE.ORG link : CVE-2021-46837

JSON object : View

Products Affected

asterisk

certified_asterisk

digium

asterisk

debian

debian_linux

CWE

CWE-476

NULL Pointer Dereference

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