CVE-2014-1895

NameCVE-2014-1895
DescriptionOff-by-one error in the flask_security_avc_cachestats function in xsm/flask/flask_op.c in Xen 4.2.x and 4.3.x, when the maximum number of physical CPUs are in use, allows local users to cause a denial of service (host crash) or obtain sensitive information from hypervisor memory by leveraging a FLASK_AVC_CACHESTAT hypercall, which triggers a buffer over-read.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xen (PTS)wheezy4.1.4-3+deb7u9fixed
wheezy (security)4.1.6.lts1-8fixed
jessie4.4.1-9+deb8u9fixed
jessie (security)4.4.1-9+deb8u10fixed
buster, sid, stretch4.8.1-1+deb9u1fixed
stretch (security)4.8.1-1+deb9u3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
xensource(unstable)4.4.0-1medium
xensourcesqueeze(not affected)
xensourcewheezy(not affected)

Notes

[squeeze] - xen <not-affected> (Only affects 4.2 and later)
[wheezy] - xen <not-affected> (Only affects 4.2 and later)

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