Linux Kernel 3.2.53/3.4.72/3.10.22/3.12.3 net/appletalk/ddp.c atalk_recvmsg input validation

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CTI Interest Score
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A vulnerability, which was classified as problematic, has been found in Linux Kernel 3.2.53/3.4.72/3.10.22/3.12.3 (Operating System). Affected by this issue is the function atalk_recvmsg of the file net/appletalk/ddp.c. 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. CVE summarizes:

The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.

The weakness was released 11/18/2013 by Hannes Frederic Sowa as Linux kernel: net: uninitialised memory leakage as not defined mailinglist post (oss-sec). The advisory is shared for download at This vulnerability is handled as CVE-2013-7267 since 01/05/2014. 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 vulnerability scanner Nessus provides a plugin with the ID 71936 (Mandriva Linux Security Advisory : kernel (MDVSA-2014:001)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195763 (Ubuntu Security Notification for Linux Vulnerabilities (USN-2109-1)).

Upgrading to version 3.2.54, 3.4.73, 3.10.23 or 3.12.4 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (90128) and Tenable (71936).







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
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Class: Input validation

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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Nessus ID: 71936
Nessus Name: Mandriva Linux Security Advisory : kernel (MDVSA-2014:001)
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OpenVAS ID: 841713
OpenVAS Name: Ubuntu Update for linux USN-2109-1
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Threat Intelligenceinfo

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Recommended: Upgrade
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Upgrade: Kernel 3.2.54/3.4.73/3.10.23/3.12.4


11/18/2013 🔍
11/18/2013 +0 days 🔍
01/05/2014 +48 days 🔍
01/06/2014 +1 days 🔍
01/06/2014 +0 days 🔍
01/06/2014 +0 days 🔍
01/06/2014 +0 days 🔍
01/09/2014 +3 days 🔍
02/17/2014 +39 days 🔍
06/04/2021 +2664 days 🔍



Advisory: Linux kernel: net: uninitialised memory leakage
Researcher: Hannes Frederic Sowa
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-7267 (🔍)

X-Force: 90128
Vulnerability Center: 43304 - Linux Kernel before 3.12.4 Local Information Disclosure Vulnerability in atalk_recvmsg(), Medium
SecurityFocus: 64739 - Linux Kernel 'net/appletalk/ddp.c' Local Information Disclosure Vulnerability
Secunia: 55882 - Linux Kernel "recvmsg()" and "recvfrom()" Information Disclosure Weakn, Not Critical
OSVDB: 101785


Created: 01/09/2014 09:40 AM
Updated: 06/04/2021 06:12 PM
Changes: 01/09/2014 09:40 AM (79), 05/21/2017 02:04 PM (6), 06/04/2021 06:12 PM (3)
Complete: 🔍
Committer: olku
Cache ID: 44:72B:40


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