Citrix Xen up to 4.2.0 access control

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Citrix Xen up to 4.2.0. This affects an unknown part. Such manipulation leads to access control. This vulnerability is documented as CVE-2012-3432. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Citrix Xen up to 4.2.0 (Connectivity Software). It has been rated as problematic. Affected by this issue is an unknown part. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is availability. CVE summarizes:

The handle_mmio function in arch/x86/hvm/io.c in the MMIO operations emulator for Xen 3.3 and 4.x, when running an HVM guest, does not properly reset certain state information between emulation cycles, which allows local guest OS users to cause a denial of service (guest OS crash) via unspecified operations on MMIO regions.

The weakness was released 07/26/2012 as Xen Security Advisory 10 as not defined advisory (Website). The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2012-3432 since 06/14/2012. The attack needs to be approached locally. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 79481 (OracleVM 2.2 : xen (OVMSA-2012-0036)), 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 370049 (Citrix XenServer Security Update (CTX134708)).

Applying a 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 Tenable (79481), SecurityFocus (BID 54691†), OSVDB (84241†), Secunia (SA49789†) and Vulnerability Center (SBV-37253†). Entries connected to this vulnerability are available at VDB-5927, VDB-6105, VDB-6107 and VDB-6108. 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: 6.2
VulDB Meta Temp Score: 5.9

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

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 79481
Nessus Name: OracleVM 2.2 : xen (OVMSA-2012-0036)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 71820
OpenVAS Name: Debian Security Advisory DSA 2531-1 (xen)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

06/14/2012 🔍
07/26/2012 +42 days 🔍
07/26/2012 +0 days 🔍
07/26/2012 +0 days 🔍
07/26/2012 +0 days 🔍
07/28/2012 +2 days 🔍
08/08/2012 +11 days 🔍
11/15/2012 +99 days 🔍
12/03/2012 +18 days 🔍
11/26/2014 +723 days 🔍
03/27/2021 +2313 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: Xen Security Advisory 10
Status: Not defined

CVE: CVE-2012-3432 (🔍)
GCVE (CVE): GCVE-0-2012-3432
GCVE (VulDB): GCVE-100-5876

OVAL: 🔍

SecurityFocus: 54691 - Xen HVM Guest User Mode MMIO Emulation Local Denial of Service Vulnerability
Secunia: 49789 - Xen HVM Guest MMIO Emulation Denial of Service Vulnerability, Not Critical
OSVDB: 84241
Vulnerability Center: 37253 - Citrix XenServer, Citrix NetScaler SDX and XenSource Xen Local Denial of Service - CVE-2012-3432, Low

See also: 🔍

Entryinfo

Created: 08/08/2012 13:28
Updated: 03/27/2021 07:40
Changes: 08/08/2012 13:28 (77), 04/21/2017 11:35 (3), 03/27/2021 07:40 (2)
Complete: 🔍
Cache ID: 216:74F:103

Once again VulDB remains the best source for vulnerability data.

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