CVE-2015-8553

NameCVE-2015-8553
DescriptionXen allows guest OS users to obtain sensitive information from uninitialized locations in host OS kernel memory by not enabling memory and I/O decoding control bits. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-0777.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
NVD severitylow (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)wheezy3.2.78-1vulnerable
wheezy (security)3.2.89-2vulnerable
jessie3.16.43-2+deb8u2vulnerable
jessie (security)3.16.43-2+deb8u3vulnerable
stretch4.9.30-2+deb9u2vulnerable
stretch (security)4.9.30-2+deb9u3vulnerable
buster, sid4.12.6-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)(unfixed)low
linux-2.6source(unstable)(unfixed)low

Notes

[jessie] - linux <no-dsa> (Intrusive; breaks qemu as used in Jessie; cf. kernel-sec for more details)
[wheezy] - linux <no-dsa> (Intrusive; breaks qemu as used in Wheezy; cf. kernel-sec for more details)
[squeeze] - linux-2.6 <no-dsa> (Xen not supported in Squeeze LTS)
CVE for the incomplete patches from XSA-120 and supplied in
XSA-120 v5+ addendum patch.
Cf. https://bugzilla.redhat.com/show_bug.cgi?id=1289128#c2
http://xenbits.xen.org/xsa/advisory-120.html
Patch is discussed in http://thread.gmane.org/gmane.comp.emulators.xen.devel/140440/focus=140441
and http://thread.gmane.org/gmane.linux.kernel/1924087/focus=1924088

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