Linux Kernel 2.6.16.9 proc access control

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel 2.6.16.9. This affects an unknown part of the file proc. This manipulation causes access control. This vulnerability is handled as CVE-2011-1020. Additionally, an exploit exists.

Detailsinfo

A vulnerability has been found in Linux Kernel 2.6.16.9 (Operating System) and classified as problematic. Affected by this vulnerability is an unknown code of the file proc. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality. The summary by CVE is:

The proc filesystem implementation in the Linux kernel 2.6.37 and earlier does not restrict access to the /proc directory tree of a process after this process performs an exec of a setuid program, which allows local users to obtain sensitive information or cause a denial of service via open, lseek, read, and write system calls.

The issue has been introduced in 03/20/2006. The weakness was released 02/28/2011 by halfdog (Website). The advisory is shared at lkml.org. This vulnerability is known as CVE-2011-1020. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. MITRE ATT&CK project uses the attack technique T1068 for this issue.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1806 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 68427 (Oracle Linux 5 : kernel (ELSA-2012-0007)), 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 216036 (VMware ESXi and ESX Third Party Libraries Updates (VMSA-2012-0013)).

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 (65693), Exploit-DB (41770), Tenable (68427), SecurityFocus (BID 46567†) and Secunia (SA43496†). Entries connected to this vulnerability are available at VDB-4416, VDB-5260, VDB-60957 and VDB-60833. 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: 4.0
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

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Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68427
Nessus Name: Oracle Linux 5 : kernel (ELSA-2012-0007)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881222
OpenVAS Name: CentOS Update for kernel CESA-2012:0007 centos5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/20/2006 🔍
02/07/2011 +1785 days 🔍
02/14/2011 +6 days 🔍
02/25/2011 +11 days 🔍
02/25/2011 +0 days 🔍
02/28/2011 +3 days 🔍
02/28/2011 +0 days 🔍
08/01/2011 +154 days 🔍
07/12/2013 +711 days 🔍
03/20/2015 +616 days 🔍
09/02/2024 +3454 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2011:1212
Researcher: halfdog
Status: Confirmed

CVE: CVE-2011-1020 (🔍)
GCVE (CVE): GCVE-0-2011-1020
GCVE (VulDB): GCVE-100-56641

OVAL: 🔍
IAVM: 🔍

X-Force: 65693
SecurityFocus: 46567 - Linux Kernel '/proc//' Permissions Handling Local Security Bypass Vulnerability
Secunia: 43496 - Linux Kernel "/proc/<pid>/" Permissions Handling Weakness, Not Critical
Vulnerability Center: 32502 - Linux Kernel 2.6.37 and earlier Local Information Disclosure or Denial of Service Vulnerability, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/20/2015 16:16
Updated: 09/02/2024 05:44
Changes: 03/20/2015 16:16 (69), 03/29/2017 09:13 (12), 10/18/2021 09:52 (3), 10/18/2021 09:56 (2), 09/02/2024 05:44 (23)
Complete: 🔍
Cache ID: 216:937:103

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