NULL Pointer Dereference Affecting xen package, versions <4.8.1-1+deb9u3
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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- published5 Jul 2017
- disclosed5 Jul 2017
Introduced: 5 Jul 2017
CVE-2017-10917 (opens in a new tab)How to fix?
Upgrade Debian:11 xen to version 4.8.1-1+deb9u3 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:11 relevant fixed versions and status.
Xen through 4.8.x does not validate the port numbers of polled event channel ports, which allows guest OS users to cause a denial of service (NULL pointer dereference and host OS crash) or possibly obtain sensitive information, aka XSA-221.
References
- https://security-tracker.debian.org/tracker/CVE-2017-10917
- http://www.debian.org/security/2017/dsa-3969
- https://security.gentoo.org/glsa/201708-03
- https://xenbits.xen.org/xsa/advisory-221.html
- http://www.securityfocus.com/bid/99157
- http://www.securitytracker.com/id/1038731
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-10917