XFS ACL 'setfacl' and 'getfacl' Symbolic Link Handling Security Bypass Vulnerability

BID:37455

Info

XFS ACL 'setfacl' and 'getfacl' Symbolic Link Handling Security Bypass Vulnerability

Bugtraq ID: 37455
Class: Design Error
CVE: CVE-2009-4411
Remote: No
Local: Yes
Published: Dec 23 2009 12:00AM
Updated: Dec 24 2014 12:54AM
Credit: Johan Ymerson
Vulnerable: XFS.org ACL 2.2.47
XFS.org ACL 2.2.46
SuSE SUSE Linux Enterprise 11
Slackware Linux x86_64 -current
Slackware Linux 13.1 x86_64
Slackware Linux 13.1
Slackware Linux 13.0 x86_64
Slackware Linux 13.0
Slackware Linux 12.2
Slackware Linux 12.1
Slackware Linux 12.0
Slackware Linux 11.0
Slackware Linux -current
S.u.S.E. openSUSE 11.1
S.u.S.E. openSUSE 11.0
Mandriva Linux Mandrake 2010.0 x86_64
Mandriva Linux Mandrake 2010.0
Mandriva Linux Mandrake 2009.1 x86_64
Mandriva Linux Mandrake 2009.1
Mandriva Linux Mandrake 2009.0 x86_64
Mandriva Linux Mandrake 2009.0
MandrakeSoft Enterprise Server 5 x86_64
MandrakeSoft Enterprise Server 5
Gentoo Linux
Not Vulnerable: XFS.org ACL 2.2.48

Discussion

XFS ACL 'setfacl' and 'getfacl' Symbolic Link Handling Security Bypass Vulnerability

XFS ACL is prone to a security-bypass vulnerability.

An attacker can exploit this issue to bypass certain security restrictions, which may allow the attacker to gain elevated privileges or launch further attacks.

ACL 2.2.46 and 2.2.47 are vulnerable; other versions may also be affected.

Exploit / POC

XFS ACL 'setfacl' and 'getfacl' Symbolic Link Handling Security Bypass Vulnerability

Local attackers can use readily available tools to exploit this issue.

Solution / Fix

XFS ACL 'setfacl' and 'getfacl' Symbolic Link Handling Security Bypass Vulnerability

Solution:
Updates are available. Please see the references for more information.


Slackware Linux 13.0 x86_64

Mandriva Linux Mandrake 2010.0 x86_64

Slackware Linux 12.1

Slackware Linux x86_64 -current

Slackware Linux 12.0

Mandriva Linux Mandrake 2009.1 x86_64

Slackware Linux -current

Mandriva Linux Mandrake 2009.0

Slackware Linux 13.0

MandrakeSoft Enterprise Server 5 x86_64

Slackware Linux 12.2

Mandriva Linux Mandrake 2009.0 x86_64

MandrakeSoft Enterprise Server 5

Slackware Linux 13.1 x86_64

Slackware Linux 11.0

Mandriva Linux Mandrake 2009.1

Slackware Linux 13.1

Mandriva Linux Mandrake 2010.0

XFS.org ACL 2.2.46

XFS.org ACL 2.2.47

References

XFS ACL 'setfacl' and 'getfacl' Symbolic Link Handling Security Bypass Vulnerability

References:

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