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TUCoPS :: Linux :: Gentoo :: bx3355.htm

Samba: Heap-based buffer overflow



Samba: Heap-based buffer overflow
Samba: Heap-based buffer overflow



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Gentoo Linux Security Advisory                           GLSA 200805-23
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http://security.gentoo.org/ 
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  Severity: Normal
     Title: Samba: Heap-based buffer overflow
      Date: May 29, 2008
      Bugs: #222299
        ID: 200805-23

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Synopsis
=======
A heap-based buffer overflow vulnerability was found in Samba, allowing
for the execution of arbitrary code.

Background
=========
Samba is a suite of SMB and CIFS client/server programs.

Affected packages
================
    -------------------------------------------------------------------
     Package       /   Vulnerable   /                       Unaffected
    -------------------------------------------------------------------
  1  net-fs/samba     < 3.0.28a-r1                       >= 3.0.28a-r1

Description
==========
Alin Rad Pop (Secunia Research) reported a vulnerability in Samba
within the receive_smb_raw() function in the file lib/util_sock.c when
parsing SMB packets, possibly leading to a heap-based buffer overflow
via an overly large SMB packet.

Impact
=====
A remote attacker could possibly exploit this vulnerability by enticing
a user to connect to a malicious server or by sending specially crafted
packets to an nmbd server configured as a local or domain master
browser, resulting in the execution of arbitrary code.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All Samba users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-fs/samba-3.0.28a-r1"

References
=========
  [ 1 ] CVE-2008-1105
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1105 

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200805-23.xml 

Concerns?
========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at 
http://bugs.gentoo.org. 

License
======
Copyright 2008 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5 


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