Linux Kernel up to 3.5.x net/tun Subsystem iotcl information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 3.5.x and classified as problematic. This issue affects the function iotcl of the file net/tun of the component net/tun Subsystem. The manipulation leads to information disclosure. This vulnerability is listed as CVE-2012-6138. There is no available exploit. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 3.5.x (Operating System). This issue affects the function iotcl of the file net/tun of the component net/tun 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. 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 presented 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. The identification of this vulnerability is CVE-2012-6138 since 12/06/2012. The exploitation is known to be easy. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. 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 (90963†) and Secunia (SA53053†). See VDB-7907, VDB-7908, VDB-7909 and VDB-7910 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: seclists.org

Timelineinfo

07/29/2012 🔍
12/06/2012 +130 days 🔍
03/05/2013 +89 days 🔍
03/08/2013 +3 days 🔍
03/15/2013 +7 days 🔍
04/17/2013 +33 days 🔍
08/18/2017 +1584 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 2013/q1/589
Researcher: Mathias Krause
Status: Not defined

CVE: CVE-2012-6138 (🔍)
GCVE (CVE): GCVE-0-2012-6138
GCVE (VulDB): GCVE-100-7913
Secunia: 53053 - Red Hat update for kernel, Not Critical
OSVDB: 90963

See also: 🔍

Entryinfo

Created: 03/08/2013 14:30
Updated: 08/18/2017 13:52
Changes: 03/08/2013 14:30 (49), 08/18/2017 13:52 (9)
Complete: 🔍
Committer:
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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