Citrix Xen up to 4.2.1 intremap.c set_msi_source_id config

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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Citrix Xen up to 4.2.1 and classified as problematic. This affects the function set_msi_source_id of the file drivers/passthrough/vtd/intremap.c. Executing a manipulation can lead to config. This vulnerability is tracked as CVE-2012-5634. No exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability has been found in Citrix Xen up to 4.2.1 (Connectivity Software) and classified as problematic. This vulnerability affects the function set_msi_source_id of the file drivers/passthrough/vtd/intremap.c. The manipulation with an unknown input leads to a config vulnerability. The CWE definition for the vulnerability is CWE-16. As an impact it is known to affect availability. CVE summarizes:

Xen 4.2.x, 4.1.x, and 4.0, when using Intel VT-d for PCI passthrough, does not properly configure VT-d when supporting a device that is behind a legacy PCI Bridge, which allows local guests to cause a denial of service to other guests by injecting an interrupt.

The weakness was disclosed 01/09/2013 with Xen.org Security Team as confirmed advisory (oss-sec). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2012-5634 since 10/24/2012. The attack needs to be approached locally. A single authentication is needed for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.004.

The vulnerability scanner Nessus provides a plugin with the ID 79493 (OracleVM 3.1 : xen (OVMSA-2013-0001)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family OracleVM Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 166475 (OpenSuSE Security Update for xen up to xsa-47 (openSUSE-SU-2013:0912-1)).

Applying the patch xsa33-4.1.patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (81115), Tenable (79493), SecurityFocus (BID 57223†), OSVDB (89058†) and Secunia (SA51734†). Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Config
CWE: CWE-16
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 79493
Nessus Name: OracleVM 3.1 : xen (OVMSA-2013-0001)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892636
OpenVAS Name: Debian Security Advisory DSA 2636-2 (xen - several vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: xsa33-4.1.patch

Timelineinfo

10/24/2012 🔍
01/09/2013 +77 days 🔍
01/09/2013 +0 days 🔍
01/09/2013 +0 days 🔍
01/09/2013 +0 days 🔍
01/09/2013 +0 days 🔍
01/11/2013 +2 days 🔍
02/14/2013 +34 days 🔍
02/14/2013 +0 days 🔍
03/12/2013 +26 days 🔍
11/26/2014 +624 days 🔍
04/22/2021 +2339 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: openwall.com
Organization: Xen.org Security Team
Status: Confirmed

CVE: CVE-2012-5634 (🔍)
GCVE (CVE): GCVE-0-2012-5634
GCVE (VulDB): GCVE-100-7312

OVAL: 🔍

X-Force: 81115
SecurityFocus: 57223 - Xen 'set_msi_source_id()' Function Local Denial of Service Vulnerability
Secunia: 51734 - Xen VT-d Interrupt Handling Denial of Service Vulnerability, Not Critical
OSVDB: 89058
SecurityTracker: 1027965 - Xen VT-d Hardware Interrupt Remapping Bug Lets Local Users Deny Service
Vulnerability Center: 38723 - Xen Multiple 4.x Versions Local DoS When Using Intel VT-d for PCI Passthrough, Low

Entryinfo

Created: 01/11/2013 15:57
Updated: 04/22/2021 06:58
Changes: 01/11/2013 15:57 (81), 04/25/2017 22:52 (6), 04/22/2021 06:58 (3)
Complete: 🔍
Committer:
Cache ID: 216:EDF:103

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