Linux Kernel 2.6.39/2.6.39.1/2.6.39.2/2.6.39.3 access control

CVSS Meta Temp Score
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CTI Interest Score
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3.7$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Linux Kernel 2.6.39/2.6.39.1/2.6.39.2/2.6.39.3. Impacted is an unknown function. Such manipulation leads to access control. This vulnerability is documented as CVE-2011-2495. The attack needs to be performed locally. There is not any exploit available.

Detailsinfo

A vulnerability was found in Linux Kernel 2.6.39/2.6.39.1/2.6.39.2/2.6.39.3 (Operating System). It has been rated as problematic. Affected by this issue is an unknown function. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality. CVE summarizes:

fs/proc/base.c in the Linux kernel before 2.6.39.4 does not properly restrict access to /proc/#####/io files, which allows local users to obtain sensitive I/O statistics by polling a file, as demonstrated by discovering the length of another user s password.

The issue has been introduced in 05/18/2011. The weakness was released 06/13/2012 with SuSE (GitHub Repository). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2011-2495. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/03/2021). The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability was handled as a non-public zero-day exploit for at least 392 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 56271 (CentOS 5 : kernel (CESA-2011:1212)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165574 (SUSE Enterprise Linux Security Update Linux Kernel (SUSE-SA:2011:038)).

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 (69546), Tenable (56271), SecurityFocus (BID 49408†) and Vulnerability Center (SBV-32983†). Entries connected to this vulnerability are available at VDB-60827, VDB-58440, VDB-58436 and VDB-65892. Once again VulDB remains the best source 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: 3.7

VulDB Base Score: 4.0
VulDB Temp Score: 3.7
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: Access control
CWE: CWE-264
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: 56271
Nessus Name: CentOS 5 : kernel (CESA-2011:1212)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 880995
OpenVAS Name: CentOS Update for kernel CESA-2011:1212 centos5 i386
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: 1d1221f375c94ef961ba8574ac4f85c8870ddd51

Timelineinfo

05/18/2011 🔍
06/15/2011 +27 days 🔍
08/25/2011 +71 days 🔍
09/01/2011 +7 days 🔍
09/06/2011 +5 days 🔍
06/13/2012 +281 days 🔍
06/13/2012 +0 days 🔍
03/23/2015 +1013 days 🔍
12/03/2021 +2447 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2011:1212
Organization: SuSE
Status: Not defined
Confirmation: 🔍

CVE: CVE-2011-2495 (🔍)
GCVE (CVE): GCVE-0-2011-2495
GCVE (VulDB): GCVE-100-60956

OVAL: 🔍
IAVM: 🔍

X-Force: 69546
SecurityFocus: 49408 - Linux Kernel '/proc/PID/io' Local Information Disclosure Vulnerability
Vulnerability Center: 32983 - Linux Kernel 2.6 - 2.6.39-rc6 \x27/proc/PID/io\x27 Interface Local Information Disclosure Vulnerability, Low

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 12/03/2021 19:41
Changes: 03/23/2015 16:50 (63), 04/15/2019 12:49 (12), 12/03/2021 19:26 (7), 12/03/2021 19:33 (1), 12/03/2021 19:41 (2)
Complete: 🔍
Cache ID: 216::103

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