CVE-2012-3494

The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when running on x86-64 systems, allows local OS guest users to cause a denial of service (host crash) by writing to the reserved bits of the DR7 debug control register.

🔗 References (50)

• secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2012-09/msg00001.html
• secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.html
• secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
• secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2012-09/msg00005.html
• secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2012-09/msg00012.html
• secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html
• secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2012-09/msg00018.html
• secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html
• secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html
• secalert@redhathttp://lists.xen.org/archives/html/xen-announce/2012-09/msg00000.html
• secalert@redhathttp://osvdb.org/85197
• secalert@redhathttp://secunia.com/advisories/50472
• secalert@redhathttp://secunia.com/advisories/50530
• secalert@redhathttp://secunia.com/advisories/51413
• secalert@redhathttp://secunia.com/advisories/55082