Resource Exhaustion Affecting xen package, versions <4.8.3+comet2+shim4.10.0+comet3-1+deb9u5
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-DEBIAN9-XEN-366352
- published27 Feb 2018
- disclosed27 Feb 2018
Introduced: 27 Feb 2018
CVE-2018-7540 (opens in a new tab)How to fix?
Upgrade Debian:9 xen to version 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 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:9 relevant fixed versions and status.
An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing.
References
- https://security-tracker.debian.org/tracker/CVE-2018-7540
- https://support.citrix.com/article/CTX232096
- https://support.citrix.com/article/CTX232655
- https://xenbits.xen.org/xsa/advisory-252.html
- https://www.debian.org/security/2018/dsa-4131
- https://lists.debian.org/debian-lts-announce/2018/03/msg00003.html
- https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html
- https://security.gentoo.org/glsa/201810-06
- http://www.securityfocus.com/bid/103174
- http://www.securitytracker.com/id/1040773
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-7540