CVE-2017-14319 Affecting xen package, versions <4.8.2+xsa245-0+deb9u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published12 Sept 2017
- disclosed12 Sept 2017
Introduced: 12 Sep 2017
CVE-2017-14319 (opens in a new tab)How to fix?
Upgrade Debian:unstable xen to version 4.8.2+xsa245-0+deb9u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
A 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.
References
- https://security-tracker.debian.org/tracker/CVE-2017-14319
- https://support.citrix.com/article/CTX227185
- http://xenbits.xen.org/xsa/advisory-234.html
- https://www.debian.org/security/2017/dsa-4050
- https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html
- http://www.securityfocus.com/bid/100819
- http://www.securitytracker.com/id/1039351
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-14319