Linux Kernel 3.2.53/3.4.72/3.10.22/3.12.3 net/x25/af_x25.c x25_recvmsg input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel 3.2.53/3.4.72/3.10.22/3.12.3. It has been rated as problematic. This affects the function x25_recvmsg of the file net/x25/af_x25.c. This manipulation causes input validation. This vulnerability is tracked as CVE-2013-7271. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Linux Kernel 3.2.53/3.4.72/3.10.22/3.12.3 (Operating System) and classified as problematic. Affected by this vulnerability is the function x25_recvmsg of the file net/x25/af_x25.c. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality. The summary by CVE is:

The x25_recvmsg function in net/x25/af_x25.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 disclosed 11/21/2013 by Hannes Frederic Sowa as Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic as not defined mailinglist post (oss-sec). It is possible to read the advisory at seclists.org. This vulnerability is known as CVE-2013-7271 since 11/04/2013. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

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 git.kernel.org. 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 (90132), Tenable (71936), SecurityFocus (BID 64746†), OSVDB (101806†) and Secunia (SA55882†). The entries VDB-11507, VDB-11712, VDB-11755 and VDB-11756 are pretty similar. 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: 6.2
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 71936
Nessus Name: Mandriva Linux Security Advisory : kernel (MDVSA-2014:001)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 841713
OpenVAS Name: Ubuntu Update for linux USN-2109-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kernel 3.2.54/3.4.73/3.10.23/3.12.4
Patch: git.kernel.org

Timelineinfo

11/04/2013 🔍
11/21/2013 +17 days 🔍
11/21/2013 +0 days 🔍
01/06/2014 +46 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 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic
Researcher: Hannes Frederic Sowa
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-7271 (🔍)
GCVE (CVE): GCVE-0-2013-7271
GCVE (VulDB): GCVE-100-11767

OVAL: 🔍

X-Force: 90132
SecurityFocus: 64746 - Linux Kernel 'net/x25/af_x25.c' Local Information Disclosure Vulnerability
Secunia: 55882 - Linux Kernel "recvmsg()" and "recvfrom()" Information Disclosure Weakn, Not Critical
OSVDB: 101806
Vulnerability Center: 43305 - Linux Kernel before 3.12.4 Local Information Disclosure Vulnerability in x25_recvmsg(), Medium

See also: 🔍

Entryinfo

Created: 01/09/2014 10:37
Updated: 06/04/2021 18:56
Changes: 01/09/2014 10:37 (80), 05/21/2017 14:04 (6), 06/04/2021 18:56 (3)
Complete: 🔍
Committer: olku
Cache ID: 216::103

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