CVE-2015-7311

NameCVE-2015-7311
Descriptionlibxl in Xen 4.1.x through 4.6.x does not properly handle the readonly flag on disks when using the qemu-xen device model, which allows local guest users to write to a read-only disk image.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-3414-1
NVD severitylow (attack range: local)
Debian Bugs823620

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xen (PTS)wheezy4.1.4-3+deb7u9vulnerable
wheezy (security)4.1.6.lts1-8vulnerable
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)4.8.0~rc3-1low823620
xensourcejessie4.4.1-9+deb8u3lowDSA-3414-1
xensourcesqueeze(not affected)

Notes

[wheezy] - xen <no-dsa> (Minor issue, xl not used in wheezy)
[squeeze] - xen <not-affected> (Only affects 4.1 and later)
http://xenbits.xen.org/xsa/advisory-142.html

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