MS02-070: Flaw in SMB Signing Could Enable Group Policy to be Modified (329170)

This script is Copyright (C) 2005-2013 Tenable Network Security, Inc.


Synopsis :

It is possible to send unsigned SMB packets.

Description :

The remote version of Windows contains a flaw in the SMB signing
implementation. SMB signing is used to sign each packets sent between a
client and a server to protect them against man-in-the-middle attacks.

If the Domain policy is configured to force usage of SMB signing, it is
possible for an attacker to downgrade the communication to disable SMB
signing and try to launch man-in-the-middle attacks.

See also :

http://technet.microsoft.com/en-us/security/bulletin/ms02-070

Solution :

Microsoft has released a set of patches for Windows XP and 2000.

Risk factor :

Medium / CVSS Base Score : 5.4
(CVSS2#AV:A/AC:M/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 4.0
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Windows : Microsoft Bulletins

Nessus Plugin ID: 11215 ()

Bugtraq ID: 6367

CVE ID: CVE-2002-1256