Linux Kernel 3.1 fs/ext4/extents.c race condition

CVSS Meta Temp Score
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CTI Interest Score
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4.0$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel 3.1. The impacted element is an unknown function of the file fs/ext4/extents.c. This manipulation causes race condition. This vulnerability is registered as CVE-2012-4508. No exploit is available.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel 3.1 (Operating System). Affected by this vulnerability is an unknown code of the file fs/ext4/extents.c. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect confidentiality. The summary by CVE is:

Race condition in fs/ext4/extents.c in the Linux kernel before 3.4.16 allows local users to obtain sensitive information from a deleted file by reading an extent that was not properly marked as uninitialized.

The weakness was published 12/21/2012 (Website). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2012-4508 since 08/21/2012. 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 67190 (Ubuntu 10.04 LTS : linux vulnerabilities (USN-1899-1)), 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 350605 (Amazon Linux Security Advisory for kernel: ALAS-2012-142).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (79600), Tenable (67190), SecurityFocus (BID 56238†) and Vulnerability Center (SBV-37182†). Similar entries are available at VDB-5384, VDB-63659, VDB-63262 and VDB-63233. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 4.0

VulDB Base Score: 4.0
VulDB Temp Score: 4.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Race condition
CWE: CWE-362
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: 67190
Nessus Name: Ubuntu 10.04 LTS : linux vulnerabilities (USN-1899-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892668
OpenVAS Name: Debian Security Advisory DSA 2668-1 (linux-2.6 - privilege escalation/denial of service/information leak
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: dee1f973ca341c266229faa5a1a5bb268bed3531
McAfee IPS: 🔍
McAfee IPS Version: 🔍

Timelineinfo

08/21/2012 🔍
10/25/2012 +65 days 🔍
10/25/2012 +0 days 🔍
11/13/2012 +19 days 🔍
12/21/2012 +38 days 🔍
12/21/2012 +0 days 🔍
07/05/2013 +196 days 🔍
03/24/2015 +627 days 🔍
12/21/2021 +2464 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-1899-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2012-4508 (🔍)
GCVE (CVE): GCVE-0-2012-4508
GCVE (VulDB): GCVE-100-63235

OVAL: 🔍

X-Force: 79600
SecurityFocus: 56238 - Linux Kernel 'ext4_convert_unwritten_exten()' Function Local Information Disclosure Vulnerability
Vulnerability Center: 37182 - Linux Kernel 2.5.69 and Earlier Local Information Disclosure Vulnerability, Medium

See also: 🔍

Entryinfo

Created: 03/24/2015 12:22
Updated: 12/21/2021 07:44
Changes: 03/24/2015 12:22 (68), 04/21/2017 11:04 (7), 12/21/2021 07:32 (5), 12/21/2021 07:38 (1), 12/21/2021 07:44 (2)
Complete: 🔍
Cache ID: 216:8C2:103

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