Linux Kernel up to 3.8.8 kernel/signal.c tkill/tgkill resource management

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3.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 3.8.8. It has been classified as problematic. The affected element is the function tkill/tgkill of the file kernel/signal.c. The manipulation leads to resource management. This vulnerability is listed as CVE-2013-2141. 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 3.8.8 (Operating System). This issue affects the function tkill/tgkill of the file kernel/signal.c. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is confidentiality. The summary by CVE is:

The do_tkill function in kernel/signal.c in the Linux kernel before 3.8.9 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel memory via a crafted application that makes a (1) tkill or (2) tgkill system call.

The weakness was presented 04/17/2013 by Emese Revfy as not defined mailinglist post (oss-sec). The advisory is shared at seclists.org. The identification of this vulnerability is CVE-2013-2141 since 02/19/2013. The exploitation is known to be easy. An attack has to be approached locally. The requirement for exploitation is a simple authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 71389 (RHEL 6 : kernel (RHSA-2013:1801)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350511 (Amazon Linux Security Advisory for kernel: ALAS-2013-233).

Upgrading to version 3.8.9 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at patchwork.kernel.org. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (84726), Tenable (71389), SecurityFocus (BID 60254†), OSVDB (93907†) and Secunia (SA53816†). See VDB-9736, VDB-10528 and VDB-63586 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: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
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: Resource management
CWE: CWE-399 / CWE-404
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: 71389
Nessus Name: RHEL 6 : kernel (RHSA-2013:1801)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892766
OpenVAS Name: Debian Security Advisory DSA 2766-1 (linux-2.6 - privilege escalation/denial of service/information leak
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Upgrade: Kernel 3.8.9
Patch: patchwork.kernel.org

Timelineinfo

02/19/2013 🔍
04/17/2013 +57 days 🔍
04/17/2013 +0 days 🔍
06/02/2013 +46 days 🔍
06/03/2013 +0 days 🔍
06/07/2013 +4 days 🔍
06/07/2013 +0 days 🔍
06/17/2013 +10 days 🔍
10/07/2013 +112 days 🔍
12/13/2013 +67 days 🔍
05/14/2021 +2709 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: seclists.org
Researcher: Emese Revfy
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-2141 (🔍)
GCVE (CVE): GCVE-0-2013-2141
GCVE (VulDB): GCVE-100-8993

OVAL: 🔍

X-Force: 84726
SecurityFocus: 60254
Secunia: 53816 - Ubuntu update for kernel, Less Critical
OSVDB: 93907
Vulnerability Center: 41793 - Linux Kernel Before 3.3.6 Local Information Disclosure Vulnerability Due to a Flaw In The do_tkill Function, Medium

See also: 🔍

Entryinfo

Created: 06/07/2013 16:19
Updated: 05/14/2021 10:30
Changes: 06/07/2013 16:19 (75), 05/13/2017 09:27 (8), 05/14/2021 10:24 (4), 05/14/2021 10:30 (1)
Complete: 🔍
Committer:
Cache ID: 216:80C:103

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

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