Linux Kernel 3.9.0/3.9.1/3.9.2/3.9.3/3.9.4 block/genhd.c format string

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6.7	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel 3.9.0/3.9.1/3.9.2/3.9.3/3.9.4. This issue affects some unknown processing of the file block/genhd.c. Performing a manipulation results in format string. This vulnerability is reported as CVE-2013-2851. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel 3.9.0/3.9.1/3.9.2/3.9.3/3.9.4 (Operating System). This affects some unknown processing of the file block/genhd.c. The manipulation with an unknown input leads to a format string vulnerability. CWE is classifying the issue as CWE-134. The product uses a function that accepts a format string as an argument, but the format string originates from an external source. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Format string vulnerability in the register_disk function in block/genhd.c in the Linux kernel through 3.9.4 allows local users to gain privileges by leveraging root access and writing format string specifiers to /sys/module/md_mod/parameters/new_array in order to create a crafted /dev/md device name.

The weakness was disclosed 06/06/2013 by Kees Cook as not defined mailinglist post (oss-sec). The advisory is shared at seclists.org. The public release happened without involvement of Linux. This vulnerability is uniquely identified as CVE-2013-2851 since 04/11/2013. The exploitability is told to be difficult. An attack has to be approached locally. Required for exploitation is a authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 79000 (RHEL 6 : kernel (RHSA-2014:0284)), 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 175902 (Debian Security Update for Linux (DSA 2745-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (79000), SecurityFocus (BID 60409†), OSVDB (94035†), Secunia (SA54526†) and Vulnerability Center (SBV-39902†). The entries VDB-9052, VDB-9055, VDB-9056 and VDB-9737 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.0
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Format string
CWE: CWE-134 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 79000
Nessus Name: RHEL 6 : kernel (RHSA-2014:0284)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892745
OpenVAS Name: Debian Security Advisory DSA 2745-1 (linux - 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: 🔍

Patch: git.kernel.org

Timelineinfo

04/11/2013 🔍
06/06/2013 +56 days 🔍
06/06/2013 +0 days 🔍
06/06/2013 +0 days 🔍
06/07/2013 +1 days 🔍
06/07/2013 +0 days 🔍
06/09/2013 +2 days 🔍
06/11/2013 +2 days 🔍
08/21/2013 +71 days 🔍
11/08/2014 +444 days 🔍
05/14/2021 +2379 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: seclists.org
Researcher: Kees Cook
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-2851 (🔍)
GCVE (CVE): GCVE-0-2013-2851
GCVE (VulDB): GCVE-100-9057

OVAL: 🔍

SecurityFocus: 60409 - Linux Kernel CVE-2013-2851 Memory Corruption Vulnerability
Secunia: 54526 - Ubuntu update for kernel, Moderately Critical
OSVDB: 94035
Vulnerability Center: 39902 - Linux Kernel <=3.9.4 Allows Local Bypass Restrictions due to Improper Formatting of Disk Names, Medium

See also: 🔍

Entryinfo

Created: 06/11/2013 15:51
Updated: 05/14/2021 14:16
Changes: 06/11/2013 15:51 (81), 05/01/2017 12:01 (4), 05/14/2021 14:16 (3)
Complete: 🔍
Committer:
Cache ID: 216:A4A:103