Citrix XenServer 5.0/5.5/5.6/6.0/6.0.2 PHYSDEVOP_get_free_pirq input validation

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in Citrix XenServer 5.0/5.5/5.6/6.0/6.0.2 (Virtualization Software) and classified as problematic. Affected by this issue is the function PHYSDEVOP_get_free_pirq. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-20. Impacted is availability.

The weakness was released 09/05/2012 by Matthew Daley as 2012-09/msg00001 as confirmed posting (Maillist). The advisory is shared for download at The public release was coordinated with the vendor. This vulnerability is handled as CVE-2012-3495 since 06/14/2012. The attack needs to be approached locally. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 62155 (Fedora 16 : xen-4.1.3-2.fc16 (2012-13443)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370049 (Citrix XenServer Security Update (CTX134708)).

Applying the patch xsa13 is able to eliminate this problem. The bugfix is ready for download at A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at SecurityFocus (BID 55406), X-Force (78266), Secunia (SA50472), SecurityTracker (ID 1027480) and Vulnerability Center (SBV-37247). Entries connected to this vulnerability are available at 5876, 5927, 6105 and 6107.





CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
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Class: Privilege escalation
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 62155
Nessus Name: Fedora 16 : xen-4.1.3-2.fc16 (2012-13443)
Nessus File: 🔍
Nessus Family: 🔍

OpenVAS ID: 864722
OpenVAS Name: Fedora Update for xen FEDORA-2012-13434
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfoedit

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Recommended: Patch
Status: 🔍

Reaction Time: 🔍
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Patch: xsa13


06/14/2012 🔍
09/05/2012 +83 days 🔍
09/05/2012 +0 days 🔍
09/05/2012 +0 days 🔍
09/05/2012 +0 days 🔍
09/05/2012 +0 days 🔍
09/10/2012 +5 days 🔍
11/15/2012 +66 days 🔍
11/23/2012 +8 days 🔍
12/26/2016 +1494 days 🔍
04/21/2017 +116 days 🔍



Advisory: 2012-09/msg00001
Researcher: Matthew Daley
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-3495 (🔍)
SecurityFocus: 55406 - Xen 'physdev_get_free_pirq' CVE-2012-3495 Denial of Service Vulnerability
Secunia: 50472 - Xen Multiple Denial of Service and Privilege Escalation Vulnerabilities, Less Critical
X-Force: 78266
SecurityTracker: 1027480 - Xen physdev_get_free_pirq() Error Checking Bug Lets Local Guest Users Deny Service on the Host
Vulnerability Center: 37247 - Citrix XenServer, Citrix NetScaler SDX and XenSource Xen Local Denial of Service - CVE-2012-3495, Medium
OSVDB: 85202

See also: 🔍


Created: 09/10/2012 02:22 PM
Updated: 04/21/2017 11:33 AM
Changes: (4) source_securityfocus_date source_securityfocus_class source_sectracker_date source_sectracker_cause
Complete: 🔍
Committer: olku


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