CVE-2021-26712 Information

Description

Incorrect access controls in res_srtp.c in Sangoma Asterisk 13.38.1 16.16.0 17.9.1 and 18.2.0 and Certified Asterisk 16.8-cert5 allow a remote unauthenticated attacker to prematurely terminate secure calls by replaying SRTP packets.

CVSS Vector

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

Reference

https://downloads.asterisk.org/pub/security/ http://seclists.org/fulldisclosure/2021/Feb/59 https://downloads.asterisk.org/pub/security/AST-2021-003.html https://issues.asterisk.org/jira/browse/ASTERISK-29260 http://packetstormsecurity.com/files/161473/Asterisk-Project-Security-Advisory-AST-2021-003.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5