DescriptionAsterisk Open Source 1.6.0.x before, 1.6.1.x before, and 1.6.2.x before, and Business Edition C.3 before C.3.3.2, allows remote attackers to cause a denial of service (daemon crash) via an SIP T.38 negotiation with an SDP FaxMaxDatagram field that is (1) missing, (2) modified to contain a negative number, or (3) modified to contain a large number.
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)

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+deb10u2fixed
bullseye (security)1:16.28.0~dfsg-0+deb11u2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
asterisksourceetch(not affected)
asterisksourcelenny(not affected)


[lenny] - asterisk <not-affected> (Only affects 1.6.x)
[etch] - asterisk <not-affected> (Only affects 1.6.x)

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