Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 3.5.x. Affected by this vulnerability is the function copy_to_user_tmpl of the file net/xfrm/xfrm_user.c of the component xfrm_user Subsystem. This manipulation causes information disclosure. The identification of this vulnerability is CVE-2012-6138. There is no exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in Linux Kernel up to 3.5.x (Operating System). It has been declared as problematic. Affected by this vulnerability is the function copy_to_user_tmpl of the file net/xfrm/xfrm_user.c of the component xfrm_user Subsystem. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: CVE-2012-6536, CVE-2012-6537, CVE-2012-6538, CVE-2012-6539, CVE-2012-6540, CVE-2012-6541, CVE-2012-6542, CVE-2012-6543, CVE-2012-6544, CVE-2012-6545, CVE-2012-6546, CVE-2012-6547, CVE-2012-6548, CVE-2012-6549. Reason: This candidate is a duplicate of CVE-2012-6536, CVE-2012-6537, CVE-2012-6538, CVE-2012-6539, CVE-2012-6540, CVE-2012-6541, CVE-2012-6542, CVE-2012-6543, CVE-2012-6544, CVE-2012-6545, CVE-2012-6546, CVE-2012-6547, CVE-2012-6548, and CVE-2012-6549. Notes: All CVE users should reference one or more of CVE-2012-6536, CVE-2012-6537, CVE-2012-6538, CVE-2012-6539, CVE-2012-6540, CVE-2012-6541, CVE-2012-6542, CVE-2012-6543, CVE-2012-6544, CVE-2012-6545, CVE-2012-6546, CVE-2012-6547, CVE-2012-6548, and CVE-2012-6549 instead of this candidate. All references and descriptions in this candidate have been removed to prevent accidental usage.

The weakness was shared 03/05/2013 by Mathias Krause as 2013/q1/589 as not defined mailinglist post (oss-sec). The advisory is shared at seclists.org. The public release happened without involvement of Linux. This vulnerability is known as CVE-2012-6138 since 12/06/2012. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at seclists.org. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at OSVDB (90959†) and Secunia (SA53053†). The entries VDB-7907, VDB-7908, VDB-7910 and VDB-7911 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5

License

• open-source

Website

• Vendor: https://www.kernel.org/

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