DSA-4236-1 xen -- security update

Debian Security Advisory

DSA-4236-1 xen -- security update

Date Reported:

27 Jun 2018

Affected Packages:

xen

Vulnerable:

Yes

Security database references:

In Mitre's CVE dictionary: CVE-2018-12891, CVE-2018-12892, CVE-2018-12893.

More information:

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/xen