Published: 30/07/2021 Updated: 07/08/2021

CVSS v2 Base Score: 4 | Impact Score: 2.9 | Exploitability Score: 8

CVSS v3 Base Score: 6.5 | Impact Score: 3.6 | Exploitability Score: 2.8

VMScore: 356

Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P

An issue exists in PJSIP in Asterisk prior to 16.19.1 and prior to 18.5.1. To exploit, a re-INVITE without SDP must be received after Asterisk has sent a BYE request.

Vulnerable Product	Search on Vulmon	Subscribe to Product
digium asterisk 18.3.0
digium asterisk 18.4.0
digium asterisk 16.17.0
digium asterisk 16.18.0
digium asterisk 16.19.0
digium asterisk 18.5.0

Asterisk Project Security Advisory - AST-2021-007 Product Asterisk Summary Remote Crash Vulnerability in PJSIP channel driver Nature of Advisory Denial of Service Susceptibility Remote Authenticated Sessions ...

CWE-617 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 https://nvd.nist.gov http://seclists.org/fulldisclosure/2021/Jul/48

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