Debian Security Advisory

DSA-4369-1 xen -- security update

Date Reported:
14 Jan 2019
Affected Packages:
xen
Vulnerable:
Yes
Security database references:
In Mitre's CVE dictionary: CVE-2018-19961, CVE-2018-19962, CVE-2018-19965, CVE-2018-19966, CVE-2018-19967.
More information:

Multiple vulnerabilities have been discovered in the Xen hypervisor:

  • CVE-2018-19961 / CVE-2018-19962

    Paul Durrant discovered that incorrect TLB handling could result in denial of service, privilege escalation or information leaks.

  • CVE-2018-19965

    Matthew Daley discovered that incorrect handling of the INVPCID instruction could result in denial of service by PV guests.

  • CVE-2018-19966

    It was discovered that a regression in the fix to address CVE-2017-15595 could result in denial of service, privilege escalation or information leaks by a PV guest.

  • CVE-2018-19967

    It was discovered that an error in some Intel CPUs could result in denial of service by a guest instance.

For the stable distribution (stretch), these problems have been fixed in version 4.8.5+shim4.10.2+xsa282-1+deb9u11.

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