Use After Free Affecting xen package, versions <4.6.0-1
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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Test your applications- Snyk IDSNYK-DEBIAN11-XEN-522194
- published21 Sept 2016
- disclosed21 Sept 2016
Introduced: 21 Sep 2016
CVE-2016-7154 (opens in a new tab)How to fix?
Upgrade Debian:11 xen to version 4.6.0-1 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.
Use-after-free vulnerability in the FIFO event channel code in Xen 4.4.x allows local guest OS administrators to cause a denial of service (host crash) and possibly execute arbitrary code or obtain sensitive information via an invalid guest frame number.
References
- https://security-tracker.debian.org/tracker/CVE-2016-7154
- http://www.debian.org/security/2016/dsa-3663
- http://support.citrix.com/article/CTX216071
- http://www.c7zero.info/stuff/csw2017_ExploringYourSystemDeeper_updated.pdf
- http://xenbits.xen.org/xsa/advisory-188.html
- http://xenbits.xen.org/xsa/xsa188.patch
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.securityfocus.com/bid/92863
- http://www.securitytracker.com/id/1036754
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-7154