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Last updated: 7/28/2014 6:27:16 PM

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National Cyber Awareness System

Vulnerability Summary for CVE-2009-3286

Original release date: 09/22/2009
Last revised: 03/19/2012
Source: US-CERT/NIST

Overview

NFSv4 in the Linux kernel 2.6.18, and possibly other versions, does not properly clean up an inode when an O_EXCL create fails, which causes files to be created with insecure settings such as setuid bits, and possibly allows local users to gain privileges, related to the execution of the do_open_permission function even when a create fails.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 4.6 (MEDIUM) (AV:L/AC:L/Au:N/C:P/I:P/A:P) (legend)
Impact Subscore: 6.4
Exploitability Subscore: 3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

Vendor Statements (disclaimer)

Official Statement from Red Hat (11/04/2009)
This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 3, 4, and Red Hat Enterprise MRG. It was addressed in Red Hat Enterprise Linux 5 via: https://rhn.redhat.com/errata/RHSA-2009-1548.html

References to Advisories, Solutions, and Tools

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External Source: VUPEN
Name: ADV-2010-0528
Type: Advisory
External Source: UBUNTU
Name: USN-852-1
External Source: OVAL
Name: oval:org.mitre.oval:def:9757
External Source: SECUNIA
Name: 38834
Type: Advisory
External Source: SECUNIA
Name: 38794
Type: Advisory
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=524520
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=81ac95c5
Type: Patch Information
External Source: REDHAT
Name: RHSA-2009:1548
External Source: OVAL
Name: oval:org.mitre.oval:def:7527
External Source: SECUNIA
Name: 37105
Type: Advisory
External Source: MLIST
Name: [security-announce] 20100303 VMSA-2010-0004 ESX Service Console and vMA third party updates
External Source: MLIST
Name: [oss-security] 20090921 CVE request: kernel: issue with O_EXCL creates on NFSv4
External Source: SUSE
Name: SUSE-SA:2010:012

References to Check Content

Identifier: oval:org.mitre.oval:def:7527
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5
Identifier: oval:org.mitre.oval:def:9757
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5

Vulnerable software and versions

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Technical Details

Vulnerability Type (View All)
  • Permissions, Privileges, and Access Control (CWE-264)