Citrix Xen up to 4.2.0 XENMEM_exchange input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Citrix Xen. This impacts an unknown function of the component XENMEM_exchange Handler. Such manipulation leads to input validation. This vulnerability is uniquely identified as CVE-2012-5513. No exploit exists. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in Citrix Xen (Connectivity Software). It has been rated as problematic. Affected by this issue is an unknown code block of the component XENMEM_exchange Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, and integrity. CVE summarizes:

The XENMEM_exchange handler in Xen 4.2 and earlier does not properly check the memory address, which allows local PV guest OS administrators to cause a denial of service (crash) or possibly gain privileges via unspecified vectors that overwrite memory in the hypervisor reserved range.

The weakness was disclosed 12/03/2012 as msg00004 as not defined posting (Website). The advisory is available at lists.xen.org. The public release has been coordinated in cooperation with the vendor. This vulnerability is handled as CVE-2012-5513 since 10/24/2012. Local access is required to approach this attack. The requirement for exploitation is a simple authentication. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 83569 (SUSE SLED10 / SLES10 Security Update : Xen (SUSE-SU-2012:1606-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370048 (Citrix XenServer Security Update (CTX135777)).

Applying the patch xsa29-4.1.patch is able to eliminate this problem. The bugfix is ready for download at lists.xen.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (80482), Tenable (83569), SecurityFocus (BID 56797†), OSVDB (88131†) and Secunia (SA51397†). rhn.redhat.com is providing further details. The entries VDB-6948, VDB-7080, VDB-7081 and VDB-7083 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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: 83569
Nessus Name: SUSE SLED10 / SLES10 Security Update : Xen (SUSE-SU-2012:1606-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892582
OpenVAS Name: Debian Security Advisory DSA 2582-1 (xen - several vulnerabilities
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: 🔍

Patch: xsa29-4.1.patch

Timelineinfo

10/24/2012 🔍
12/03/2012 +40 days 🔍
12/03/2012 +0 days 🔍
12/03/2012 +0 days 🔍
12/04/2012 +1 days 🔍
12/04/2012 +0 days 🔍
12/05/2012 +1 days 🔍
12/07/2012 +2 days 🔍
12/10/2012 +3 days 🔍
12/13/2012 +3 days 🔍
05/20/2015 +888 days 🔍
04/20/2021 +2162 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: msg00004
Status: Not defined
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-5513 (🔍)
GCVE (CVE): GCVE-0-2012-5513
GCVE (VulDB): GCVE-100-7082

OVAL: 🔍

X-Force: 80482
SecurityFocus: 56797 - Xen 'XENMEM_exchange' Local Privilege Escalation Vulnerability
Secunia: 51397 - Xen Multiple Vulnerabilities, Less Critical
OSVDB: 88131
Vulnerability Center: 37583 - Xen 3.0 Through 3.3.1 and 4.0 Through 4.1.2 Remote Privilege Escalation Vulnerability, High

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 12/07/2012 10:29
Updated: 04/20/2021 07:05
Changes: 12/07/2012 10:29 (84), 04/22/2017 12:58 (5), 04/20/2021 07:05 (3)
Complete: 🔍
Committer: olku
Cache ID: 216::103

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