res_pjsip_t38 in Sangoma Asterisk 15.x before 15.7.4 and 16.x before 16.5.1
allows an attacker to trigger a crash by sending a declined stream in a
response to a T.38 re-invite initiated by Asterisk. The crash occurs
because of a NULL session media object dereference.
downloads.asterisk.org/pub/security/AST-2019-004-15.diff
downloads.asterisk.org/pub/security/AST-2019-004-16.diff
downloads.asterisk.org/pub/security/AST-2019-004.html
packetstormsecurity.com/files/154371/Asterisk-Project-Security-Advisory-AST-2019-004.html
launchpad.net/bugs/cve/CVE-2019-15297
nvd.nist.gov/vuln/detail/CVE-2019-15297
security-tracker.debian.org/tracker/CVE-2019-15297
www.cve.org/CVERecord?id=CVE-2019-15297