VDB-9056 · CVE-2013-2852 · SA54212

Linux Kernel 3.9.0/3.9.1/3.9.2/3.9.3/3.9.4 main.c modprobe format string

CVSS Meta Temp Score
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CTI Interest Score
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8.0$0-$5k0.00

A vulnerability, which was classified as critical, has been found in Linux Kernel 3.9.0/3.9.1/3.9.2/3.9.3/3.9.4 (Operating System). Affected by this issue is an unknown code block of the file drivers/net/wireless/b43/main.c. The manipulation of the argument modprobe with an unknown input leads to a format string vulnerability. Using CWE to declare the problem leads to CWE-134. The product uses a function that accepts a format string as an argument, but the format string originates from an external source. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Format string vulnerability in the b43_request_firmware function in drivers/net/wireless/b43/main.c in the Broadcom B43 wireless driver in the Linux kernel through 3.9.4 allows local users to gain privileges by leveraging root access and including format string specifiers in an fwpostfix modprobe parameter, leading to improper construction of an error message.

The weakness was released 06/06/2013 by Kees Cook as not defined mailinglist post (oss-sec). The advisory is shared for download at seclists.org. The public release was coordinated with the vendor. This vulnerability is handled as CVE-2013-2852 since 04/11/2013. 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 69126 (Ubuntu 12.10 : linux vulnerability (USN-1917-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350526 (Amazon Linux Security Advisory for kernel: ALAS-2013-218).

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 vulnerability database at Tenable (69126). Entries connected to this vulnerability are available at 7997, 8073, 8484 and 8499.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 8.0

VulDB Base Score: 8.4
VulDB Temp Score: 8.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Current Price Estimation: 🔍

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Nessus ID: 69126
Nessus Name: Ubuntu 12.10 : linux vulnerability (USN-1917-1)
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: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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Patch: git.kernel.org

Timelineinfo

04/11/2013 🔍
06/06/2013 +56 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 🔍
07/18/2013 +37 days 🔍
07/30/2013 +12 days 🔍
05/14/2021 +2845 days 🔍

Sourcesinfo

Vendor: kernel.org

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

CVE: CVE-2013-2852 (🔍)
OVAL: 🔍

Vulnerability Center: 39903 - Linux Kernel <=3.9.4 Allows Local Bypass Restrictions via 'b43\x27 Wireless Driver, Medium
Secunia: 54212 - Red Hat update for kernel, Less Critical
OSVDB: 94034

See also: 🔍

Entryinfo

Created: 06/11/2013 15:49
Updated: 05/14/2021 14:14
Changes: 06/11/2013 15:49 (74), 08/26/2017 06:42 (8), 05/14/2021 14:14 (3)
Complete: 🔍
Committer:

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