Linux Kernel 2.6.28 nfs_permission access control

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Linux Kernel 2.6.28. The affected element is the function nfs_permission. The manipulation results in access control. This vulnerability is identified as CVE-2009-1630. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel 2.6.28 (Operating System). Affected is the function nfs_permission. 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 nfs_permission function in fs/nfs/dir.c in the NFS client implementation in the Linux kernel 2.6.29.3 and earlier, when atomic_open is available, does not check execute (aka EXEC or MAY_EXEC) permission bits, which allows local users to bypass permissions and execute files, as demonstrated by files on an NFSv4 fileserver.

The bug was discovered 05/13/2009. The weakness was released 05/14/2009 (Website). The advisory is available at linux-nfs.org. This vulnerability is traded as CVE-2009-1630 since 05/14/2009. 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. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 140 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 38990 (Debian DSA-1809-1 : linux-2.6 - denial of service, privilege escalation), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165654 (SUSE Enterprise Linux Security Update Linux Kernel (SUSE-SA:2009:045)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (50524), Tenable (38990), SecurityFocus (BID 34934†), OSVDB (54492†) and Secunia (SA35106†). Entries connected to this vulnerability are available at VDB-46707, VDB-44965, VDB-49049 and VDB-48416. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.9
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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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: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 38990
Nessus Name: Debian DSA-1809-1 : linux-2.6 - denial of service, privilege escalation
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 64111
OpenVAS Name: Debian Security Advisory DSA 1809-1 (linux-2.6)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

12/25/2008 🔍
05/09/2009 +135 days 🔍
05/09/2009 +0 days 🔍
05/13/2009 +4 days 🔍
05/14/2009 +1 days 🔍
05/14/2009 +0 days 🔍
05/14/2009 +0 days 🔍
05/14/2009 +0 days 🔍
05/15/2009 +1 days 🔍
06/01/2009 +17 days 🔍
06/03/2009 +2 days 🔍
03/17/2015 +2113 days 🔍
09/03/2019 +1631 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: linux-nfs.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-1630 (🔍)
GCVE (CVE): GCVE-0-2009-1630
GCVE (VulDB): GCVE-100-48186

OVAL: 🔍

X-Force: 50524
SecurityFocus: 34934 - Linux Kernel NFS 'MAY_EXEC' Security Bypass Vulnerability
Secunia: 35106 - Linux Kernel NFSv4 "MAY_EXEC" Security Bypass, Less Critical
OSVDB: 54492 - CVE-2009-1630 - Linux - Kernel - Security Bypass Issue
Vulnerability Center: 22024 - Linux Kernel NFS <= 2.6.29.3 NFSv4 Share Local Security Bypass Vulnerability, High
Vupen: ADV-2009-1331

See also: 🔍

Entryinfo

Created: 03/17/2015 23:38
Updated: 09/03/2019 18:07
Changes: 03/17/2015 23:38 (84), 09/03/2019 18:07 (5)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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