Debian Security Advisory

DSA-3969-1 xen -- security update

Date Reported:
12 Sep 2017
Affected Packages:
xen
Vulnerable:
Yes
Security database references:
In Mitre's CVE dictionary: CVE-2017-10912, CVE-2017-10913, CVE-2017-10914, CVE-2017-10915, CVE-2017-10916, CVE-2017-10917, CVE-2017-10918, CVE-2017-10919, CVE-2017-10920, CVE-2017-10921, CVE-2017-10922, CVE-2017-12135, CVE-2017-12136, CVE-2017-12137, CVE-2017-12855.
More information:

Multiple vulnerabilities have been discovered in the Xen hypervisor:

  • CVE-2017-10912

    Jann Horn discovered that incorrectly handling of page transfers might result in privilege escalation.

  • CVE-2017-10913 / CVE-2017-10914

    Jann Horn discovered that race conditions in grant handling might result in information leaks or privilege escalation.

  • CVE-2017-10915

    Andrew Cooper discovered that incorrect reference counting with shadow paging might result in privilege escalation.

  • CVE-2017-10916

    Andrew Cooper discovered an information leak in the handling of the Memory Protection Extensions (MPX) and Protection Key (PKU) CPU features. This only affects Debian stretch.

  • CVE-2017-10917

    Ankur Arora discovered a NULL pointer dereference in event polling, resulting in denial of service.

  • CVE-2017-10918

    Julien Grall discovered that incorrect error handling in physical-to-machine memory mappings may result in privilege escalation, denial of service or an information leak.

  • CVE-2017-10919

    Julien Grall discovered that incorrect handling of virtual interrupt injection on ARM systems may result in denial of service.

  • CVE-2017-10920 / CVE-2017-10921 / CVE-2017-10922

    Jan Beulich discovered multiple places where reference counting on grant table operations was incorrect, resulting in potential privilege escalation.

  • CVE-2017-12135

    Jan Beulich found multiple problems in the handling of transitive grants which could result in denial of service and potentially privilege escalation.

  • CVE-2017-12136

    Ian Jackson discovered that race conditions in the allocator for grant mappings may result in denial of service or privilege escalation. This only affects Debian stretch.

  • CVE-2017-12137

    Andrew Cooper discovered that incorrect validation of grants may result in privilege escalation.

  • CVE-2017-12855

    Jan Beulich discovered that incorrect grant status handling, thus incorrectly informing the guest that the grant is no longer in use.

  • XSA-235 (no CVE yet)

    Wei Liu discovered that incorrect locking of add-to-physmap operations on ARM may result in denial of service.

For the oldstable distribution (jessie), these problems have been fixed in version 4.4.1-9+deb8u10.

For the stable distribution (stretch), these problems have been fixed in version 4.8.1-1+deb9u3.

We recommend that you upgrade your xen packages.