Linux Kernel 2.6.16.9 btrfs_xattr_set_acl access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.9$0-$5k0.00

A vulnerability, which was classified as problematic, was found in Linux Kernel 2.6.16.9 (Operating System). Affected is the function btrfs_xattr_set_acl. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The btrfs_xattr_set_acl function in fs/btrfs/acl.c in btrfs in the Linux kernel 2.6.34 and earlier does not check file ownership before setting an ACL, which allows local users to bypass file permissions by setting arbitrary ACLs, as demonstrated using setfacl.

The issue has been introduced in 03/20/2006. The weakness was published 06/16/2010 (Website). The advisory is available at lkml.org. This vulnerability is traded as CVE-2010-2071. The exploitability is told to be easy. Local access is required to approach this attack. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/18/2021). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 1549 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 47722 (Fedora 12 : kernel-2.6.32.16-141.fc12 (2010-10880)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 118689 (Fedora Update for Kernel (FEDORA-2010-10876)).

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 Tenable (47722), SecurityFocus (BID 39719†) and Vulnerability Center (SBV-26368†).

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.9

VulDB Base Score: 5.9
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

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

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 47722
Nessus Name: Fedora 12 : kernel-2.6.32.16-141.fc12 (2010-10880)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 862237
OpenVAS Name: Fedora Update for kernel FEDORA-2010-10876
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/20/2006 🔍
04/27/2010 +1499 days 🔍
05/25/2010 +27 days 🔍
06/14/2010 +20 days 🔍
06/16/2010 +2 days 🔍
06/16/2010 +0 days 🔍
07/12/2010 +26 days 🔍
07/14/2010 +2 days 🔍
03/19/2015 +1709 days 🔍
09/18/2021 +2375 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: lkml.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2010-2071 (🔍)
OVAL: 🔍

SecurityFocus: 39719 - Linux Kernel 'find_keyring_by_name()' Local Memory Corruption Vulnerability
Vulnerability Center: 26368 - Linux kernel 2.6.34-rc6 and Prior btrfs Local File Permissions Bypass by Setting Arbitrary ACLs, Medium

Entryinfo

Created: 03/19/2015 12:22 PM
Updated: 09/18/2021 07:01 AM
Changes: 03/19/2015 12:22 PM (63), 02/28/2017 12:27 PM (9), 09/18/2021 06:50 AM (4), 09/18/2021 07:01 AM (1)
Complete: 🔍
Cache ID: 3:4BE:40

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