CVE-2021-31878 Information

Description

An issue was discovered in PJSIP in Asterisk before 16.19.1 and before 18.5.1. To exploit a re-INVITE without SDP must be received after Asterisk has sent a BYE request.

CVSS Vector

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

Reference

https://downloads.digium.com/pub/security/AST-2021-007.html http://seclists.org/fulldisclosure/2021/Jul/48 http://downloads.asterisk.org/pub/security/AST-2021-007.html http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html https://issues.asterisk.org/jira/browse/ASTERISK-29381

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5