National Vulnerability Database (NVD) National Vulnerability Database (CVE-2009-4411)

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Vulnerability Summary for CVE-2009-4411

Original release date:12/24/2009

Last revised:03/04/2010

Source: US-CERT/NIST

Overview

The (1) setfacl and (2) getfacl commands in XFS acl 2.2.47, when running in recursive (-R) mode, follow symbolic links even when the --physical (aka -P) or -L option is specified, which might allow local users to modify the ACL for arbitrary files or directories via a symlink attack.

Impact

CVSS Severity (version 2.0):

CVSS v2 Base Score:3.7 (LOW) (AV:L/AC:H/Au:N/C:P/I:P/A:P) (legend)

Impact Subscore: 6.4

Exploitability Subscore: 1.9

CVSS Version 2 Metrics:

Access Vector: Locally exploitable

Access Complexity: High

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 (01/21/2010)

Not vulnerable. This issue did not affect the versions of acl as shipped with Red Hat Enterprise Linux 3, 4, or 5.

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External Source: BID

Name: 37455

Type: Patch Information

Hyperlink:http://www.securityfocus.com/bid/37455

External Source: XF

Name: acl-setfacl-getfacl-symlink(55004)

Hyperlink:http://xforce.iss.net/xforce/xfdb/55004

External Source: MLIST

Name: [oss-security] 20091223 CVE request: acl 2.2.47 always follows symlinks

Hyperlink:http://www.openwall.com/lists/oss-security/2009/12/23/2

External Source: MANDRIVA

Name: MDVSA-2009:345