CVE-2012-3516

The GNTTABOP_swap_grant_ref sub-operation in the grant table hypercall in Xen 4.2 and Citrix XenServer 6.0.2 allows local guest kernels or administrators to cause a denial of service (host crash) and possibly gain privileges via a crafted grant reference that triggers a write to an arbitrary hypervisor memory location.

🔗 References (14)

• secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
• secalert@redhathttp://secunia.com/advisories/50472
• secalert@redhathttp://secunia.com/advisories/50530
• secalert@redhathttp://support.citrix.com/article/CTX134708
• secalert@redhathttp://wiki.xen.org/wiki/Security_Announcements#XSA-18_grant_table_entry_swaps_have_inadequate_bounds_checking
• secalert@redhathttp://www.openwall.com/lists/oss-security/2012/09/05/11
• secalert@redhathttp://www.securityfocus.com/bid/55411
• af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
• af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/50472
• af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/50530
• af854a3a-2127-422b-91ae-364da2661108http://support.citrix.com/article/CTX134708
• af854a3a-2127-422b-91ae-364da2661108http://wiki.xen.org/wiki/Security_Announcements#XSA-18_grant_table_entry_swaps_have_inadequate_bounds_checking
• af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2012/09/05/11
• af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/55411