CVE-2012-3494

Citrix XenServer < 6.0.2 and Xen 4.0-4.2 - Denial of Service via DR7 Debug Register

Title source: llm
STIX 2.1

Description

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 (25)

Core 25
Core References
Various Sources mailing-list x_refsource_mlist
http://lists.xen.org/archives/html/xen-announce/2012-09/msg00000.html
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/55082
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/50530
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/51413
Third Party Advisory vendor-advisory x_refsource_gentoo
http://security.gentoo.org/glsa/glsa-201309-24.xml
Issue Tracking x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=851139
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/50472
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/55400
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2012/09/05/5
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201604-03
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/78265
Patch, Vendor Advisory x_refsource_confirm
http://support.citrix.com/article/CTX134708
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://osvdb.org/85197
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id?1027479
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2012/dsa-2544

Scores

EPSS 0.0011
EPSS Percentile 29.1%

Details

CWE
CWE-264
Status published
Products (4)
citrix/xenserver < 6.0.2 (2 CPE variants)
xen/xen 4.0.0 (2 CPE variants)
xen/xen 4.1.0 (2 CPE variants)
xen/xen 4.2.0 (2 CPE variants)
Published Nov 23, 2012
Tracked Since Feb 18, 2026