Debian Stretch DSA-4236-1 Critical: Xen Denial Of Service Threats
debian
June 27, 2018
Multiple vulnerabilities have been discovered in the Xen hypervisor: CVE-2018-12891
Topics Covered
Summary
Multiple vulnerabilities have been discovered in the Xen hypervisor:
CVE-2018-12891
It was discovered that insufficient validation of PV MMU operations
may result in denial of service.
CVE-2018-12892
It was discovered that libxl fails to honour the 'readonly' flag on
HVM-emulated SCSI disks.
CVE-2018-12893
It was discovered that incorrect implementation of debug exception
checks could result in denial of service.
For the stable distribution (stretch), these problems have been fixed in
version 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9.
We recommend that you upgrade your xen packages.
For the detailed security status of xen please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/xen
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
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Package: xen
CVE ID: CVE-2018-12891 CVE-2018-12892 CVE-2018-12893
Topics Covered
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