National Vulnerability Database (NVD) National Vulnerability Database (CVE-2009-3286)

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Last updated: Sun Nov 22 14:29:37 EST 2009

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Vulnerability Summary for CVE-2009-3286

Original release date:09/22/2009

Last revised:11/06/2009

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

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External Source: CONFIRM

Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=81ac95c5

Type: Patch Information

Hyperlink:http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=81ac95c5

External Source: REDHAT

Name: RHSA-2009:1548

Hyperlink:https://rhn.redhat.com/errata/RHSA-2009-1548.html

External Source: CONFIRM

Name: https://bugzilla.redhat.com/show_bug.cgi?id=524520

Hyperlink:https://bugzilla.redhat.com/show_bug.cgi?id=524520

External Source: MLIST

Name: [oss-security] 20090921 CVE request: kernel: issue with O_EXCL creates on NFSv4