Citrix Xen 4.0.0/4.1.0/4.2.0 Transcendent Memory (TMEM) input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Citrix Xen 4.0.0/4.1.0/4.2.0. It has been rated as problematic. The affected element is an unknown function of the component Transcendent Memory (TMEM). Performing a manipulation results in input validation. This vulnerability is identified as CVE-2012-3497. There is not any exploit available. Disabling the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Citrix Xen 4.0.0/4.1.0/4.2.0 (Connectivity Software). This affects an unknown function of the component Transcendent Memory (TMEM). The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

(1) TMEMC_SAVE_GET_CLIENT_WEIGHT, (2) TMEMC_SAVE_GET_CLIENT_CAP, (3) TMEMC_SAVE_GET_CLIENT_FLAGS and (4) TMEMC_SAVE_END in the Transcendent Memory (TMEM) in Xen 4.0, 4.1, and 4.2 allow local guest OS users to cause a denial of service (NULL pointer dereference or memory corruption and host crash) or possibly have other unspecified impacts via a NULL client id.

The weakness was released 09/05/2012 by Matthew Daley as 2012-09/msg00006 as confirmed posting (Maillist). It is possible to read the advisory at lists.xen.org. The public release was coordinated with Citrix. This vulnerability is uniquely identified as CVE-2012-3497 since 06/14/2012. Attacking locally is a requirement. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 83564 (SUSE SLED10 / SLES10 Security Update : Xen (SUSE-SU-2012:1487-1)), 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 165715 (SUSE Enterprise Linux Security update for libvirt (SUSE-SU-2012:1503-1)).

The best possible mitigation is suggested to be disabling the affected component. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (78268), Tenable (83564), SecurityFocus (BID 55410†), OSVDB (85199†) and Secunia (SA50472†). Entries connected to this vulnerability are available at VDB-6108, VDB-6106, VDB-6109 and VDB-6110. Be aware that VulDB is the high quality 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: 5.9
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.9
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 83564
Nessus Name: SUSE SLED10 / SLES10 Security Update : Xen (SUSE-SU-2012:1487-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 850374
OpenVAS Name: SuSE Update for XEN openSUSE-SU-2012:1572-1 (XEN)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Disable
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

06/14/2012 🔍
09/05/2012 +82 days 🔍
09/05/2012 +0 days 🔍
09/05/2012 +0 days 🔍
09/05/2012 +0 days 🔍
09/07/2012 +2 days 🔍
09/10/2012 +3 days 🔍
11/23/2012 +74 days 🔍
04/25/2013 +153 days 🔍
05/20/2015 +755 days 🔍
04/12/2021 +2154 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: 2012-09/msg00006
Researcher: Matthew Daley
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-3497 (🔍)
GCVE (CVE): GCVE-0-2012-3497
GCVE (VulDB): GCVE-100-6111
X-Force: 78268 - Xen TMEM privilege escalation, High Risk
SecurityFocus: 55410 - Xen 'TMEM hypercall' Multiple Security Vulnerabilities
Secunia: 50472 - Xen Multiple Denial of Service and Privilege Escalation Vulnerabilities, Less Critical
OSVDB: 85199
SecurityTracker: 1027482 - Xen Transcendent Memory (TMEM) Multiple Flaws Lets Local Users on the Guest Operating System Gain Elevated Privileges on the Host
Vulnerability Center: 39345 - Xen Transcendent Memory Allows Local DoS Vulnerability via a NULL Client ID, Low

See also: 🔍

Entryinfo

Created: 09/10/2012 12:47
Updated: 04/12/2021 08:24
Changes: 09/10/2012 12:47 (51), 04/28/2017 09:18 (31), 04/12/2021 08:17 (8), 04/12/2021 08:21 (2), 04/12/2021 08:24 (1)
Complete: 🔍
Committer: olku
Cache ID: 216::103

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