CVE-2012-3494

low

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

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00001.html

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.html

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00005.html

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00012.html

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00018.html

http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html

http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html

http://lists.xen.org/archives/html/xen-announce/2012-09/msg00000.html

http://osvdb.org/85197

http://secunia.com/advisories/50472

http://secunia.com/advisories/50530

http://secunia.com/advisories/51413

http://secunia.com/advisories/55082

http://security.gentoo.org/glsa/glsa-201309-24.xml

http://support.citrix.com/article/CTX134708

http://wiki.xen.org/wiki/Security_Announcements#XSA-12_hypercall_set_debugreg_vulnerability

http://www.debian.org/security/2012/dsa-2544

http://www.openwall.com/lists/oss-security/2012/09/05/5

http://www.securityfocus.com/bid/55400

http://www.securitytracker.com/id?1027479

https://bugzilla.redhat.com/show_bug.cgi?id=851139

https://exchange.xforce.ibmcloud.com/vulnerabilities/78265

https://security.gentoo.org/glsa/201604-03

Details

Source: MITRE

Published: 2012-11-23

Updated: 2017-08-29

Type: CWE-264

Risk Information

CVSS v2

Base Score: 2.1

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 3.9

Severity: LOW