CVE-2020-35776

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

A buffer overflow in res_pjsip_diversion.c in Sangoma Asterisk versions 13.38.1, 16.15.1, 17.9.1, and 18.1.1 allows remote attacker to crash Asterisk by deliberately misusing SIP 181 responses.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-120

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://packetstormsecurity.com/files/161470/Asterisk-Project-Security-Advisory-AST-2021-001.htmlPatch, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Feb/57Mailing List, Third Party Advisory
https://downloads.asterisk.org/pub/security/AST-2021-001.htmlVendor Advisory
https://issues.asterisk.org/Issue Tracking, Vendor Advisory
https://issues.asterisk.org/jira/browse/ASTERISK-29227Exploit, Issue Tracking, Patch, Vendor Advisory
http://packetstormsecurity.com/files/161470/Asterisk-Project-Security-Advisory-AST-2021-001.htmlPatch, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Feb/57Mailing List, Third Party Advisory
https://downloads.asterisk.org/pub/security/AST-2021-001.htmlVendor Advisory
https://issues.asterisk.org/Issue Tracking, Vendor Advisory
https://issues.asterisk.org/jira/browse/ASTERISK-29227Exploit, Issue Tracking, Patch, Vendor Advisory

Timeline

Published: Feb 18, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2020

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