SynopsisThe remote Debian host is missing a security update.
DescriptionMultiple vulnerabilities have been discovered in the Xen hypervisor :
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.
Andrew Cooper discovered that incorrect reference counting with shadow paging might result in privilege escalation.
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-2017-10920 / 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
Jan Beulich found multiple problems in the handling of transitive grants which could result in denial of service and potentially privilege escalation.
Andrew Cooper discovered that incorrect validation of grants may result in privilege escalation.
Jan Beulich discovered that incorrect grant status handling, thus incorrectly informing the guest that the grant is no longer in use.
Matthew Daley discovered that the NUMA node parameter wasn't verified which which may result in privilege escalation.
Eric Chanudet discovered that a race conditions in cxenstored might result in information leaks or privilege escalation.
Matthew Daley discovered that incorrect validation of grants may result in a denial of service.
Andrew Cooper discovered that insufficient grant unmapping checks may result in denial of service and privilege escalation.
For Debian 7 'Wheezy', these problems have been fixed in version 4.1.6.lts1-9.
We recommend that you upgrade your xen packages.
NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpgrade the affected packages.