CVE-2017-14319

NameCVE-2017-14319
DescriptionA grant unmapping issue was discovered in Xen through 4.9.x. When removing or replacing a grant mapping, the x86 PV specific path needs to make sure page table entries remain in sync with other accounting done. Although the identity of the page frame was validated correctly, neither the presence of the mapping nor page writability were taken into account.
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)
ReferencesDLA-1132-1, DSA-4050-1
NVD severityhigh (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xen (PTS)jessie4.4.1-9+deb8u10vulnerable
jessie (security)4.4.4lts1-0+deb8u1vulnerable
buster, sid, stretch4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9fixed
stretch (security)4.8.4+xsa273+shim4.10.1+xsa273-1+deb9u10fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
xensource(unstable)4.8.2+xsa245-0+deb9u1high
xensourcestretch4.8.2+xsa245-0+deb9u1highDSA-4050-1
xensourcewheezy4.1.6.lts1-9highDLA-1132-1

Notes

https://xenbits.xen.org/xsa/advisory-234.html

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