CVE ID:	CVE-2021-31878
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.
Test IDs:	1.3.6.1.4.1.25623.1.0.146370
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-31878 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://downloads.digium.com/pub/security/AST-2021-007.html https://issues.asterisk.org/jira/browse/ASTERISK-29381