CVE-2016-9942

NameCVE-2016-9942
DescriptionHeap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1979-1, DLA-777-1, DSA-3753-1
NVD severityhigh
Debian Bugs850008

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
italc (PTS)jessie1:2.0.2+dfsg1-2vulnerable
jessie (security)1:2.0.2+dfsg1-2+deb8u1fixed
stretch1:3.0.3+dfsg1-1vulnerable
libvncserver (PTS)jessie0.9.9+dfsg2-6.1+deb8u3fixed
jessie (security)0.9.9+dfsg2-6.1+deb8u6fixed
stretch (security), stretch0.9.11+dfsg-1.3~deb9u1fixed
bullseye, sid, buster0.9.11+dfsg-1.3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
italcsource(unstable)(unfixed)
italcsourcejessie1:2.0.2+dfsg1-2+deb8u1DLA-1979-1
libvncserversource(unstable)0.9.11+dfsg-1850008
libvncserversourcejessie0.9.9+dfsg2-6.1+deb8u2DSA-3753-1
libvncserversourcewheezy0.9.9+dfsg-1+deb7u2DLA-777-1

Notes

https://github.com/LibVNC/libvncserver/pull/137
https://github.com/LibVNC/libvncserver/pull/137/commits/5fff4353f66427b467eb29e5fdc1da4f2be028bb

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