10 - DSA-3969

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 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 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.