CVE-2012-3495

Summary

CVE	CVE-2012-3495
State	PUBLISHED
Assigner	redhat
Source Priority	CVE Program / NVD first with legacy fallback
Published	2012-11-23 20:55:03 UTC
Updated	2026-04-29 01:13:23 UTC
Description	The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.

Risk And Classification

Primary CVSS: v2.0 6.1 from [email protected]

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

Problem Types: CWE-20 | n/a

CVSS v2.0 Breakdown

Access Vector

Local

Access Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Complete

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

NVD Known Affected Configurations (CPE 2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Application	Citrix	Xenserver	5.0	All	All	All
Application	Citrix	Xenserver	5.5	All	All	All
Application	Citrix	Xenserver	5.6	All	All	All
Application	Citrix	Xenserver	5.6	fp1	All	All
Application	Citrix	Xenserver	5.6	sp2	All	All
Application	Citrix	Xenserver	6.0	All	All	All
Application	Citrix	Xenserver	All	All	All	All
Operating System	Xen	Xen	4.1.0	All	All	All
Operating System	Xen	Xen	4.1.1	All	All	All
Operating System	Xen	Xen	4.1.2	All	All	All
Operating System	Xen	Xen	4.1.3	All	All	All

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Na	N/a	affected n/a	Not specified

References

Reference	Source	Link	Tags
[security-announce] SUSE-SU-2012:1132-1: important: Security update for	af854a3a-2127-422b-91ae-364da2661108	lists.opensuse.org
Xen 'physdev_get_free_pirq' CVE-2012-3495 Denial of Service Vulnerability	af854a3a-2127-422b-91ae-364da2661108	www.securityfocus.com
Gentoo Linux Documentation -- Xen: Multiple vulnerabilities	af854a3a-2127-422b-91ae-364da2661108	security.gentoo.org
[security-announce] openSUSE-SU-2012:1572-1: important: XEN: security an	af854a3a-2127-422b-91ae-364da2661108	lists.opensuse.org
Xen physdev_get_free_pirq() Error Checking Bug Lets Local Guest Users Deny Service on the Host - SecurityTracker	af854a3a-2127-422b-91ae-364da2661108	www.securitytracker.com
[security-announce] openSUSE-SU-2012:1573-1: important: XEN: security an	af854a3a-2127-422b-91ae-364da2661108	lists.opensuse.org
Citrix XenServer Multiple Security Updates	af854a3a-2127-422b-91ae-364da2661108	support.citrix.com
[security-announce] openSUSE-SU-2012:1172-1: important: Security Update	af854a3a-2127-422b-91ae-364da2661108	lists.opensuse.org
[Xen-announce] Xen Security Advisory 13 (CVE-2012-3495) - hypercall physdev_get_free_pirq vulnerability	af854a3a-2127-422b-91ae-364da2661108	lists.xen.org
Security Advisory SA51413 - SUSE update for xen - Secunia	af854a3a-2127-422b-91ae-364da2661108	secunia.com
[security-announce] SUSE-SU-2012:1133-1: important: Security update for	af854a3a-2127-422b-91ae-364da2661108	lists.opensuse.org
Security Announcements - Xen	af854a3a-2127-422b-91ae-364da2661108	wiki.xen.org
xen-4.1-testing.hg: 6779ddca8593	af854a3a-2127-422b-91ae-364da2661108	xenbits.xen.org
Security Advisory SA55082 - Gentoo update for xen - Secunia	af854a3a-2127-422b-91ae-364da2661108	secunia.com
Xen: Multiple vulnerabilities (GLSA 201604-03) — Gentoo Security	af854a3a-2127-422b-91ae-364da2661108	security.gentoo.org
oss-security - Xen Security Advisory 13 (CVE-2012-3495) - hypercall physdev_get_free_pirq vulnerability	af854a3a-2127-422b-91ae-364da2661108	www.openwall.com
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

No vendor comments have been submitted for this CVE.

There are currently no legacy QID mappings associated with this CVE.