CVE Vulnerability

CVE-2021-31878

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.

4 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

6.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

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.digium.com/pub/security/AST-2021-007.html Patch Vendor Advisory
http://seclists.org/fulldisclosure/2021/Jul/48 Mailing List Patch
http://downloads.asterisk.org/pub/security/AST-2021-007.html Patch Vendor Advisory
http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html Patch Third Party Advisory
https://issues.asterisk.org/jira/browse/ASTERISK-29381 Exploit Issue Tracking
Configurations

Configuration 1

cpe:2.3:a:digium:asterisk:18.3.0:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:18.4.0:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:16.17.0:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:16.18.0:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:16.19.0:*:*:*:*:*:*:*
cpe:2.3:a:digium:asterisk:18.5.0:*:*:*:*:*:*:*
Information

Published : 2021-07-30 02:15

Updated : 2021-08-07 02:05

NVD link : CVE-2021-31878

Mitre link : CVE-2021-31878

Products Affected
No products.
CWE
CWE-617