CVE-2020-35776 Information

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.

CVSS Vector

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

Reference

http://seclists.org/fulldisclosure/2021/Feb/57 https://downloads.asterisk.org/pub/security/AST-2021-001.html https://issues.asterisk.org/ https://issues.asterisk.org/jira/browse/ASTERISK-29227 http://packetstormsecurity.com/files/161470/Asterisk-Project-Security-Advisory-AST-2021-001.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5