PT-2012-4759 · Citrix+1 · Xenserver+2

Published 2012-09-06 · Updated 2017-08-29 · CVE-2012-3494

Positive Technologies (AI Summary)

CVSS v2.0

2.1

Low

Base vector

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

Name of the Vulnerable Software and Affected Versions Xen versions 4.0 through 4.2 Citrix XenServer version 6.0.2 and earlier

Description The issue allows local OS guest users to cause a denial of service by writing to the reserved bits of the DR7 debug control register. This is possible through the set debugreg hypercall in include/asm-x86/debugreg.h when running on x86-64 systems.

Recommendations For Xen versions 4.0 through 4.2, consider restricting access to the set debugreg hypercall to prevent local OS guest users from causing a denial of service. For Citrix XenServer version 6.0.2 and earlier, restrict access to the set debugreg hypercall in include/asm-x86/debugreg.h to minimize the risk of exploitation.

Fix

DoS

Weakness Enumeration

CWE-264

Related Identifiers

CVE-2012-3494

DSA-2544-1

OPENSUSE-SU-2012_1172-1

OPENSUSE-SU-2012_1174-1

OPENSUSE-SU-2012_1572-1

OPENSUSE-SU-2012_1573-1

SUSE-SU-2012_1129-1

SUSE-SU-2012_1132-1

SUSE-SU-2012_1133-1

SUSE-SU-2012_1162-1

Affected Products

Suse

Xen

Xenserver

References · 96

• http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3516 · Security Note
• https://security.gentoo.org/glsa/201604-03 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2012-3494 · Security Note
• http://secunia.com/advisories/50472 · Vendor Advisory
• https://bdu.fstec.ru/vul/2015-04588 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3498 · Security Note
• http://security.gentoo.org/glsa/glsa-201309-24.xml · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00001.html · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3496 · Security Note
• http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00005.html · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2012-3494 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00018.html · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3515 · Security Note