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CERT Coordination Center

Samba command injection vulnerability

Vulnerability Note VU#268336

Original Release Date: 2007-05-14 | Last Revised: 2008-07-21

Overview

Samba fails to properly filter input to /bin/sh. This vulnerability may allow a remote, authenticated attacker to execute arbitrary code on a Samba server.

Description

Samba provides file and print services for Microsoft Windows, Unix, Linux, and OS X clients. Samba can also act as a Primary Domain Controller (PDC) or as a Domain Member. Samba runs on most Unix-like systems.

Samba versions prior to 3.0.24 pass unchecked user input from RPC messages to /bin/sh when calling externals scripts that are listed in the Samba configuration file. An attacker may be able to exploit this vulnerability by sending specially crafted RPC messages to a vulnerable server.

This vulnerability occurred as a result of failing to comply with recommndation STR02-C of the CERT C Programming Language Secure Coding Standard.

Impact

A remote, unauthenticated attacker may be able to execute arbitrary commands.

Solution

Apply a patch or upgrade
These vulnerabilities are addressed in Samba version 3.0.25. In addition, patches are available to address this vulnerability in Samba version 3.0.24. Refer to the Samba Security Releases website for more information.

Do not load external shell scripts


From the CVE-2007-2447 entry on the Samba security page:

This defect may be alleviated by removing all defined external script invocations (username map script, add printer command, etc...) from smb.conf.

Restrict access

Limiting access to the Samba server to trusted hosts may mitigate this vulnerability.

Vendor Information

268336
 
Affected   Unknown   Unaffected

Apple Computer, Inc.

Notified:  May 14, 2007 Updated:  July 30, 2007

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Debian GNU/Linux

Notified:  May 14, 2007 Updated:  July 30, 2007

Status

  Vulnerable

Vendor Statement

These problems have been fixed in Debian GNU/Linux 4.0 with version 3.0.24-6etch1 via Debian Security Advisory 1291 as in

<http://www.debian.org/security/2007/dsa-1291>

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Gentoo Linux

Notified:  May 14, 2007 Updated:  May 16, 2007

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Red Hat, Inc.

Notified:  May 14, 2007 Updated:  May 15, 2007

Status

  Vulnerable

Vendor Statement

This issue affected the Samba package as shipped with Red Hat Enterprise Linux 2.1, 4, 4, and 5. Updated packages to correct this issue are available along with our advisories at the URLs below and via Red Hat Network.

http://rhn.redhat.com/errata/RHSA-2007-0354.html

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Samba

Updated:  May 14, 2007

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

See http://samba.org/samba/security/CVE-2007-2447.html for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Slackware Linux Inc.

Notified:  May 14, 2007 Updated:  May 16, 2007

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Sun Microsystems, Inc.

Notified:  May 14, 2007 Updated:  May 15, 2007

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Ubuntu

Notified:  May 14, 2007 Updated:  May 16, 2007

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

See http://www.ubuntu.com/usn/usn-460-1 for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Novell, Inc.

Notified:  May 14, 2007 Updated:  June 01, 2007

Status

  Not Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Conectiva Inc.

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Cray Inc.

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

EMC, Inc. (formerly Data General Corporation)

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Engarde Secure Linux

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

F5 Networks, Inc.

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Fedora Project

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

FreeBSD, Inc.

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Fujitsu

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Hewlett-Packard Company

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Hitachi

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

IBM Corporation

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

IBM Corporation (zseries)

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

IBM eServer

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Immunix Communications, Inc.

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Ingrian Networks, Inc.

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Juniper Networks, Inc.

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Mandriva, Inc.

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Microsoft Corporation

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

MontaVista Software, Inc.

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

NEC Corporation

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

NetBSD

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Nokia

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

OpenBSD

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Openwall GNU/*/Linux

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

QNX, Software Systems, Inc.

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

SUSE Linux

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Silicon Graphics, Inc.

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Sony Corporation

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

The SCO Group

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Trustix Secure Linux

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Turbolinux

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Unisys

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Wind River Systems, Inc.

Notified:  May 14, 2007 Updated:  May 14, 2007

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Credit

Thanks to Joshua J. Drake, iDefense Labs, and the Samba team for information that was used in this report.

This document was written by Ryan Giobbi.

Other Information

CVE IDs: CVE-2007-2447
Severity Metric: 7.44
Date Public: 2007-05-14
Date First Published: 2007-05-14
Date Last Updated: 2008-07-21 17:51 UTC
Document Revision: 41

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