Linux Kernel up to 3.5.x l2tp Subsystem net/l2tp/l2tp_ip6.c getsockname information disclosure

Summaryinfo

A vulnerability was found in Linux Kernel up to 3.5.x. It has been declared as problematic. The impacted element is the function getsockname of the file net/l2tp/l2tp_ip6.c of the component l2tp Subsystem. Such manipulation leads to information disclosure. This vulnerability is documented as CVE-2012-6138. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Linux Kernel up to 3.5.x (Operating System) and classified as problematic. Affected by this issue is the function getsockname of the file net/l2tp/l2tp_ip6.c of the component l2tp Subsystem. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

** 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 released 03/05/2013 by Mathias Krause as 2013/q1/589 as not defined mailinglist post (oss-sec). The advisory is shared for download at seclists.org. The public release happened without coordination with the vendor. This vulnerability is handled as CVE-2012-6138 since 12/06/2012. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

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 vulnerability database at OSVDB (90966†). Entries connected to this vulnerability are available at VDB-7907, VDB-7908, VDB-7909 and VDB-7910. Once again VulDB remains the best source for 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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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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