Vulnerability DatabaseCVE-2012-3494
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CVE-2012-3494
November 23, 2012
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.
Related Resources (25)
http://lists.xen.org/archives/html/xen-announce/2012-09/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00018.html
https://bugzilla.redhat.com/show_bug.cgi?id=851139
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html
http://wiki.xen.org/wiki/Security_Announcements#XSA-12_hypercall_set_debugreg_vulnerability
http://security.gentoo.org/glsa/glsa-201309-24.xml
http://secunia.com/advisories/50472
http://secunia.com/advisories/51413
http://www.securitytracker.com/id?1027479
http://secunia.com/advisories/50530
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.html
http://support.citrix.com/article/CTX134708
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html
http://osvdb.org/85197
http://www.openwall.com/lists/oss-security/2012/09/05/5
http://www.securityfocus.com/bid/55400
http://secunia.com/advisories/55082
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00012.html
https://security.gentoo.org/glsa/201604-03
http://www.debian.org/security/2012/dsa-2544
https://exchange.xforce.ibmcloud.com/vulnerabilities/78265
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CVSS v4
Base Score:
6.9
Attack Vector
ADJACENT
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
CVSS v2
Base Score:
2.1
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
EPSS
Base Score:
0.11