Linux Kernel 3.2.1 ext4_fill_flex_info numeric error

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel 3.2.1 and classified as problematic. This impacts the function ext4_fill_flex_info. The manipulation leads to numeric error. This vulnerability is traded as CVE-2012-2100. There is no exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in Linux Kernel 3.2.1 (Operating System) and classified as critical. This issue affects the function ext4_fill_flex_info. The manipulation with an unknown input leads to a numeric error vulnerability. Using CWE to declare the problem leads to CWE-189. Impacted is availability. The summary by CVE is:

The ext4_fill_flex_info function in fs/ext4/super.c in the Linux kernel before 3.2.2, on the x86 platform and unspecified other platforms, allows user-assisted remote attackers to trigger inconsistent filesystem-groups data and possibly cause a denial of service via a malformed ext4 filesystem containing a super block with a large FLEX_BG group size (aka s_log_groups_per_flex value). NOTE: this vulnerability exists because of an incomplete fix for CVE-2009-4307.

The weakness was shared 07/03/2012 as confirmed git commit (GIT Repository). The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2012-2100 since 04/04/2012. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 68654 (Oracle Linux 5 : kernel (ELSA-2012-1445)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350598 (Amazon Linux Security Advisory for kernel,nvidia: ALAS-2013-148).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

The vulnerability is also documented in the databases at X-Force (76016), Tenable (68654), SecurityFocus (BID 53414†) and Vulnerability Center (SBV-36237†). The entries VDB-51130, VDB-60959 and VDB-63237 are related to this item. 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: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68654
Nessus Name: Oracle Linux 5 : kernel (ELSA-2012-1445)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881539
OpenVAS Name: CentOS Update for kernel CESA-2012:1445 centos5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: d50f2ab6f050311dbf7b8f5501b25f0bf64a439b

Timelineinfo

04/04/2012 🔍
04/04/2012 +0 days 🔍
07/03/2012 +90 days 🔍
07/03/2012 +0 days 🔍
07/03/2012 +0 days 🔍
09/25/2012 +84 days 🔍
07/12/2013 +290 days 🔍
03/23/2015 +619 days 🔍
12/05/2021 +2449 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2010:0178
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-2100 (🔍)
GCVE (CVE): GCVE-0-2012-2100
GCVE (VulDB): GCVE-100-61169

OVAL: 🔍

X-Force: 76016
SecurityFocus: 53414 - Linux Kernel EXT4 'ext4_fill_flex_info()' Local Denial of Service Vulnerability
Vulnerability Center: 36237 - Linux Kernel < 3.2.2 on x86 'ext4_fill_flex_info\x27 Allows Remote DoS via a Malformed ext4 Filesystem, High

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 12/05/2021 16:18
Changes: 03/23/2015 16:50 (65), 04/17/2017 11:22 (11), 12/05/2021 16:04 (4), 12/05/2021 16:10 (1), 12/05/2021 16:18 (2)
Complete: 🔍
Cache ID: 216::103

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

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