Samba Symlink Directory Traversal Vulnerability

BID:38111

Info

Samba Symlink Directory Traversal Vulnerability

Bugtraq ID: 38111
Class: Input Validation Error
CVE: CVE-2010-0926
Remote: Yes
Local: No
Published: Feb 04 2010 12:00AM
Updated: Mar 21 2012 09:50PM
Credit: Kingcope
Vulnerable: Ubuntu Ubuntu Linux 9.10 sparc
Ubuntu Ubuntu Linux 9.10 powerpc
Ubuntu Ubuntu Linux 9.10 lpia
Ubuntu Ubuntu Linux 9.10 i386
Ubuntu Ubuntu Linux 9.10 amd64
Ubuntu Ubuntu Linux 9.04 sparc
Ubuntu Ubuntu Linux 9.04 powerpc
Ubuntu Ubuntu Linux 9.04 lpia
Ubuntu Ubuntu Linux 9.04 i386
Ubuntu Ubuntu Linux 9.04 amd64
Ubuntu Ubuntu Linux 8.10 sparc
Ubuntu Ubuntu Linux 8.10 powerpc
Ubuntu Ubuntu Linux 8.10 lpia
Ubuntu Ubuntu Linux 8.10 i386
Ubuntu Ubuntu Linux 8.10 amd64
Ubuntu Ubuntu Linux 8.04 LTS sparc
Ubuntu Ubuntu Linux 8.04 LTS powerpc
Ubuntu Ubuntu Linux 8.04 LTS lpia
Ubuntu Ubuntu Linux 8.04 LTS i386
Ubuntu Ubuntu Linux 8.04 LTS amd64
Ubuntu Ubuntu Linux 6.06 LTS sparc
Ubuntu Ubuntu Linux 6.06 LTS powerpc
Ubuntu Ubuntu Linux 6.06 LTS i386
Ubuntu Ubuntu Linux 6.06 LTS amd64
SuSE SUSE Linux Enterprise Server 9
SuSE SUSE Linux Enterprise 11
SuSE SUSE Linux Enterprise 10 SP3
SuSE SUSE Linux Enterprise 10 SP2
Samba Samba 3.4.5
Samba Samba 3.4.2
Samba Samba 3.4.1
Samba Samba 3.3.8
Samba Samba 3.3.7
Samba Samba 3.3.6
Samba Samba 3.3.5
Samba Samba 3.2.15
Samba Samba 3.2.14
Samba Samba 3.2.13
Samba Samba 3.2.12
Samba Samba 3.2.5
Samba Samba 3.2.4
Samba Samba 3.2.3
Samba Samba 3.2.2
Samba Samba 3.2.1
Samba Samba 3.2
Samba Samba 3.0.37
Samba Samba 3.0.36
Samba Samba 3.0.35
Samba Samba 3.0.34
Samba Samba 3.0.33
Samba Samba 3.0.32
Samba Samba 3.0.30
+ Mandriva Linux Mandrake 2007.1 x86_64
+ Mandriva Linux Mandrake 2007.1
+ Ubuntu Ubuntu Linux 7.04 sparc
+ Ubuntu Ubuntu Linux 7.04 powerpc
+ Ubuntu Ubuntu Linux 7.04 i386
+ Ubuntu Ubuntu Linux 7.04 amd64
Samba Samba 3.0.29
Samba Samba 3.0.28 a
Samba Samba 3.0.28
Samba Samba 3.0.27
Samba Samba 3.0.26
Samba Samba 3.0.25 rc3
Samba Samba 3.0.25 rc2
Samba Samba 3.0.25 rc1
Samba Samba 3.0.25 pre2
Samba Samba 3.0.25 pre1
Samba Samba 3.0.25 c
Samba Samba 3.0.25 b
Samba Samba 3.0.25 a
Samba Samba 3.0.25
Samba Samba 3.0.24
+ Mandriva Linux Mandrake 2007.1 x86_64
+ Mandriva Linux Mandrake 2007.1
+ Mandriva Linux Mandrake 2007.1
+ Ubuntu Ubuntu Linux 7.04 sparc
+ Ubuntu Ubuntu Linux 7.04 powerpc
+ Ubuntu Ubuntu Linux 7.04 i386
+ Ubuntu Ubuntu Linux 7.04 amd64
Samba Samba 3.0.22
+ Ubuntu Ubuntu Linux 6.06 LTS sparc
+ Ubuntu Ubuntu Linux 6.06 LTS powerpc
+ Ubuntu Ubuntu Linux 6.06 LTS i386
+ Ubuntu Ubuntu Linux 6.06 LTS amd64
Samba Samba 3.0.21
Samba Samba 3.0.20
+ Slackware Linux 10.2
Samba Samba 3.0.14
Samba Samba 3.0.13
Samba Samba 3.0.12
Samba Samba 3.0.11
Samba Samba 3.0.10
+ Slackware Linux 10.1
+ Trustix Secure Enterprise Linux 2.0
+ Trustix Secure Enterprise Linux 2.0
+ Trustix Secure Enterprise Linux 2.0
+ Trustix Secure Linux 2.2
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.1
Samba Samba 3.0.9
+ OpenPKG OpenPKG Current
+ OpenPKG OpenPKG Current
+ S.u.S.E. Linux Personal 9.1
Samba Samba 3.0.8
Samba Samba 3.0.7
+ Mandriva Linux Mandrake 10.1 x86_64
+ Mandriva Linux Mandrake 10.1 x86_64
+ Mandriva Linux Mandrake 10.1
+ Mandriva Linux Mandrake 10.1
+ OpenPKG OpenPKG 2.2
+ S.u.S.E. Linux Personal 9.2
+ S.u.S.E. Linux Personal 9.2
+ Trustix Secure Enterprise Linux 2.0
+ Trustix Secure Enterprise Linux 2.0
+ Trustix Secure Linux 2.2
+ Trustix Secure Linux 2.2
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.1
+ Trustix Secure Linux 2.0
+ Trustix Secure Linux 2.0
+ Trustix Secure Linux 1.5
+ Trustix Secure Linux 1.5
+ Ubuntu Ubuntu Linux 4.1 ppc
+ Ubuntu Ubuntu Linux 4.1 ppc
+ Ubuntu Ubuntu Linux 4.1 ia64
+ Ubuntu Ubuntu Linux 4.1 ia64
+ Ubuntu Ubuntu Linux 4.1 ia32
+ Ubuntu Ubuntu Linux 4.1 ia32
Samba Samba 3.0.6
+ Mandriva Linux Mandrake 10.0 AMD64
+ Mandriva Linux Mandrake 10.0 AMD64
+ Mandriva Linux Mandrake 10.0
+ Mandriva Linux Mandrake 10.0
+ Turbolinux Appliance Server 1.0 Workgroup Edition
+ Turbolinux Appliance Server 1.0 Workgroup Edition
+ Turbolinux Appliance Server 1.0 Hosting Edition
+ Turbolinux Appliance Server 1.0 Hosting Edition
+ Turbolinux Appliance Server Hosting Edition 1.0
+ Turbolinux Appliance Server Hosting Edition 1.0
+ Turbolinux Appliance Server Workgroup Edition 1.0
+ Turbolinux Appliance Server Workgroup Edition 1.0
+ Turbolinux Home
+ Turbolinux Home
+ Turbolinux Turbolinux Desktop 10.0
+ Turbolinux Turbolinux Desktop 10.0
+ Turbolinux Turbolinux Server 10.0
+ Turbolinux Turbolinux Server 10.0
+ Turbolinux Turbolinux Server 8.0
+ Turbolinux Turbolinux Server 8.0
+ Turbolinux Turbolinux Workstation 8.0
Samba Samba 3.0.5
Samba Samba 3.0.4 -r1
Samba Samba 3.0.4
+ OpenPKG OpenPKG 2.1
+ S.u.S.E. Linux Personal 9.1
+ S.u.S.E. Linux Personal 9.1
+ S.u.S.E. Linux Personal 9.1
+ Slackware Linux 10.0
Samba Samba 3.0.3
Samba Samba 3.0.2 a
Samba Samba 3.0.2
Samba Samba 3.0.1
Samba Samba 3.0 alpha
Samba Samba 3.0
+ Apple Mac OS X 10.3.2
+ Apple Mac OS X 10.3.2
+ Apple Mac OS X 10.3.1
+ Apple Mac OS X 10.3.1
+ Apple Mac OS X 10.3
+ Apple Mac OS X 10.3
+ Apple Mac OS X Server 10.3.2
+ Apple Mac OS X Server 10.3.1
+ Apple Mac OS X Server 10.3.1
+ Apple Mac OS X Server 10.3
+ Apple Mac OS X Server 10.3
Samba Samba 4.0.0tp5
Samba Samba 3.0.27a
Samba Samba 3.0.26a
Samba Samba 3.0.23d
+ Mandriva Linux Mandrake 2007.0 x86_64
+ Mandriva Linux Mandrake 2007.0
Samba Samba 3.0.23c
+ Slackware Linux 11.0
Samba Samba 3.0.23b
Samba Samba 3.0.23a
+ MandrakeSoft Corporate Server 4.0 x86_64
+ MandrakeSoft Corporate Server 4.0
Samba Samba 3.0.21c
Samba Samba 3.0.21b
Samba Samba 3.0.21a
Samba Samba 3.0.20b
Samba Samba 3.0.20a
Samba Samba 3.0.14a
S.u.S.E. openSUSE 11.2
S.u.S.E. openSUSE 11.1
S.u.S.E. openSUSE 11.0
RedHat Enterprise Linux Desktop Workstation 5 client
Red Hat Enterprise Linux Desktop 5 client
Red Hat Enterprise Linux 5 Server
Pardus Linux 2009 0
Oracle Enterprise Linux 5
Avaya Voice Portal 5.1.2
Avaya Voice Portal 5.1.1
Avaya Voice Portal 5.1 SP1
Avaya Voice Portal 5.1
Avaya Voice Portal 5.1
Avaya Voice Portal 5.0 SP2
Avaya Voice Portal 5.0 SP1
Avaya Voice Portal 5.0
Avaya IP Office Application Server 8.0
Avaya Aura System Manager 6.1.3
Avaya Aura System Manager 6.1.2
Avaya Aura System Manager 6.1.1
Avaya Aura System Manager 6.1 SP2
Avaya Aura System Manager 6.1 Sp1
Avaya Aura System Manager 6.1
Avaya Aura System Manager 6.0 SP1
Avaya Aura System Manager 6.0
Avaya Aura System Manager 5.2
Avaya Aura Presence Services 6.1.1
Avaya Aura Presence Services 6.1
Avaya Aura Presence Services 6.0
Not Vulnerable:

Discussion

Samba Symlink Directory Traversal Vulnerability

Samba is prone to a directory-traversal vulnerability because the application fails to sufficiently sanitize user-supplied input.

Exploits would allow an attacker to access files outside of the Samba user's root directory to obtain sensitive information and perform other attacks.

To exploit this issue, attackers require authenticated access to a writable share. Note that this issue may be exploited through a writable share accessible by guest accounts.

NOTE: The vendor stated that this issue stems from an insecure default configuration. The Samba team advises administrators to set 'wide links = no' in the '[global]' section of 'smb.conf'.

Exploit / POC

Samba Symlink Directory Traversal Vulnerability

An attacker can exploit this issue using standard commands and readily available tools.

The following exploits are available:

Solution / Fix

Samba Symlink Directory Traversal Vulnerability

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


Ubuntu Ubuntu Linux 8.10 powerpc

Ubuntu Ubuntu Linux 9.10 powerpc

Ubuntu Ubuntu Linux 9.10 lpia

Ubuntu Ubuntu Linux 9.04 sparc

Ubuntu Ubuntu Linux 9.04 lpia

Ubuntu Ubuntu Linux 8.10 sparc

Ubuntu Ubuntu Linux 9.10 amd64

Ubuntu Ubuntu Linux 9.04 amd64

Ubuntu Ubuntu Linux 8.10 i386

Ubuntu Ubuntu Linux 8.04 LTS lpia

Ubuntu Ubuntu Linux 6.06 LTS i386

Ubuntu Ubuntu Linux 8.04 LTS i386

Ubuntu Ubuntu Linux 9.10 sparc

Ubuntu Ubuntu Linux 8.04 LTS powerpc

Ubuntu Ubuntu Linux 8.04 LTS sparc

References

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