Secunia Research: Samba "reply_netbios_packet()" Buffer Overflow Vulnerability

2007-11-16T00:00:00
ID SECURITYVULNS:DOC:18427
Type securityvulns
Reporter Securityvulns
Modified 2007-11-16T00:00:00

Description

======================================================================

                 Secunia Research 15/11/2007
  • Samba "reply_netbios_packet()" Buffer Overflow Vulnerability -

====================================================================== Table of Contents

Affected Software....................................................1 Severity.............................................................2 Vendor's Description of Software.....................................3 Description of Vulnerability.........................................4 Solution.............................................................5 Time Table...........................................................6 Credits..............................................................7 References...........................................................8 About Secunia........................................................9 Verification........................................................10

====================================================================== 1) Affected Software

  • Samba 3.0.26a

NOTE: Other versions may also be affected.

====================================================================== 2) Severity

Rating: Moderately critical Impact: System access Where: Local network

====================================================================== 3) Vendor's Description of Software

"Samba is an Open Source/Free Software suite that has, since 1992, provided file and print services to all manner of SMB/CIFS clients, including the numerous versions of Microsoft Windows operating systems. Samba is freely available under the GNU General Public License."

Product Link: http://www.samba.org/

====================================================================== 4) Description of Vulnerability

Secunia Research has discovered a vulnerability in Samba, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the "reply_netbios_packet()" function in nmbd/nmbd_packets.c when sending NetBIOS replies. This can be exploited to cause a stack-based buffer overflow by sending multiple specially crafted WINS "Name Registration" requests followed by a WINS "Name Query" request.

Successful exploitation allows execution of arbitrary code, but requires that Samba is configured to run as a WINS server (the "wins support" option is enabled).

====================================================================== 5) Solution

Apply patch or update to version 3.0.27.

====================================================================== 6) Time Table

30/10/2007 - Vendor notified. 30/10/2007 - vendor-sec notified. 30/10/2007 - Vendor response. 15/11/2007 - Public disclosure.

====================================================================== 7) Credits

Discovered by Alin Rad Pop, Secunia Research.

====================================================================== 8) References

Samba: http://us1.samba.org/samba/security/CVE-2007-4572.html

The Common Vulnerabilities and Exposures (CVE) project has assigned CVE-2007-5398 for the vulnerability.

====================================================================== 9) About Secunia

Secunia offers vulnerability management solutions to corporate customers with verified and reliable vulnerability intelligence relevant to their specific system configuration:

http://corporate.secunia.com/

Secunia also provides a publicly accessible and comprehensive advisory database as a service to the security community and private individuals, who are interested in or concerned about IT-security.

http://secunia.com/

Secunia believes that it is important to support the community and to do active vulnerability research in order to aid improving the security and reliability of software in general:

http://corporate.secunia.com/secunia_research/33/

Secunia regularly hires new skilled team members. Check the URL below to see currently vacant positions:

http://secunia.com/secunia_vacancies/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/

====================================================================== 10) Verification

Please verify this advisory by visiting the Secunia website: http://secunia.com/secunia_research/2007-90/

Complete list of vulnerability reports published by Secunia Research: http://secunia.com/secunia_research/

======================================================================