CVE-2016-1922

NameCVE-2016-1922
DescriptionQEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. In that, 'current_cpu' remains null, which leads to the null pointer dereference. A user or process could use this flaw to crash the QEMU instance, resulting in DoS issue.
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)
ReferencesDSA-3469-1, DSA-3470-1, DSA-3471-1
NVD severitylow
Debian Bugs811201

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qemu (PTS)jessie1:2.1+dfsg-12+deb8u6fixed
jessie (security)1:2.1+dfsg-12+deb8u12fixed
stretch (security), stretch1:2.8+dfsg-6+deb9u8fixed
buster1:3.1+dfsg-8+deb10u2fixed
buster (security)1:3.1+dfsg-8+deb10u3fixed
bullseye, sid1:4.1-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qemusource(unstable)1:2.5+dfsg-4811201
qemusourcejessie1:2.1+dfsg-12+deb8u5aDSA-3471-1
qemusourcesqueeze(unfixed)end-of-life
qemusourcewheezy1.1.2+dfsg-6a+deb7u12DSA-3469-1
qemu-kvmsource(unstable)(unfixed)
qemu-kvmsourcesqueeze(unfixed)end-of-life
qemu-kvmsourcewheezy1.1.2+dfsg-6+deb7u12DSA-3470-1

Notes

[squeeze] - qemu <end-of-life> (Unsupported in squeeze-lts)
[squeeze] - qemu-kvm <end-of-life> (Unsupported in squeeze-lts)
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg02812.html
https://bugzilla.redhat.com/show_bug.cgi?id=1283934
http://www.openwall.com/lists/oss-security/2016/01/16/1
Possibly introduced in http://git.qemu.org/?p=qemu.git;a=commit;h=4917cf44326a1bda2fd7f27303aff7a25ad86518 (v1.6.0-rc0)
kvmapic introduced after 1.0.50 (http://git.qemu.org/?p=qemu.git;a=commit;h=e5ad936b0fd7dfd7fd7908be6f9f1ca88f63b96b)

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