CVE-2016-3710

NameCVE-2016-3710
DescriptionThe VGA module in QEMU improperly performs bounds checking on banked access to video memory, which allows local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the "Dark Portal" issue.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-539-1, DLA-540-1, DLA-571-1, DSA-3573-1
NVD severityhigh (attack range: local)
Debian Bugs823830

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qemu (PTS)wheezy1.1.2+dfsg-6a+deb7u12vulnerable
wheezy (security)1.1.2+dfsg-6+deb7u20fixed
jessie (security), jessie1:2.1+dfsg-12+deb8u6fixed
stretch, sid1:2.8+dfsg-3fixed
qemu-kvm (PTS)wheezy1.1.2+dfsg-6+deb7u12vulnerable
wheezy (security)1.1.2+dfsg-6+deb7u20fixed
xen (PTS)wheezy4.1.4-3+deb7u9vulnerable
wheezy (security)4.1.6.lts1-5fixed
jessie (security), jessie4.4.1-9+deb8u8fixed
stretch, sid4.8.1~pre.2017.01.23-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qemusource(unstable)1:2.6+dfsg-1high823830
qemusourcejessie1:2.1+dfsg-12+deb8u6highDSA-3573-1
qemusourcewheezy1.1.2+dfsg-6a+deb7u13highDLA-540-1
qemu-kvmsource(unstable)(unfixed)high
qemu-kvmsourcewheezy1.1.2+dfsg-6+deb7u13highDLA-539-1
xensource(unstable)4.4.0-1high
xensourcewheezy4.1.6.lts1-1highDLA-571-1

Notes

[wheezy] - xen <no-dsa> (default configuration not vulnerable)
Xen switched to qemu-system in 4.4.0-1
http://xenbits.xen.org/xsa/advisory-179.html
mitigation: run HVM in stubdomains, PV, default video card not vulnerable, i386-only

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