CVE-2019-18976

NameCVE-2019-18976
DescriptionAn issue was discovered in res_pjsip_t38.c in Sangoma Asterisk through 13.x and Certified Asterisk through 13.21-x. If it receives a re-invite initiating T.38 faxing and has a port of 0 and no c line in the SDP, a NULL pointer dereference and crash will occur. This is different from CVE-2019-18940.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2969-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
asterisk (PTS)buster1:16.2.1~dfsg-1+deb10u2fixed
buster (security)1:16.28.0~dfsg-0+deb10u1fixed
bullseye1:16.16.1~dfsg-1+deb11u1fixed
bullseye (security)1:16.28.0~dfsg-0+deb11u1fixed
bookworm, sid1:20.0.0~dfsg+~cs6.12.40431414-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
asterisksourcejessie(not affected)
asterisksourcestretch1:13.14.1~dfsg-2+deb9u6DLA-2969-1
asterisksource(unstable)1:16.1.1~dfsg-1

Notes

[jessie] - asterisk <not-affected> (Vulnerable code not present)
https://downloads.asterisk.org/pub/security/AST-2019-008.html
https://issues.asterisk.org/jira/browse/ASTERISK-28612
Only affects 13.x, marking first unstable upload after 13.x as fixed

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