Vulnerability Note VU#518782
Ethereal fails to properly handle malformed SMB packets
Ethereal contains a vulnerability in the way it processes Server Message Block (SMB) packets.
The Server Message Block (SMB) protocol is used for sharing files, printers, and other resources between computers. SMB is used in Microsoft Windows to provide file and print services. Ethereal includes the ability to decode packets containing SMB data. There is a vulnerability in the way the SMB dissector decodes SMB packets containing a policy name without a handle. If SID snooping is enabled, this could trigger a null pointer dereference and a remote, unauthenticated attacker could cause Ethereal to crash or potentially execute code of the attacker's choice.
A remote, unauthenticated attacker could cause Ethereal to crash or potentially execute code of the attacker's choice.
Upgrade to version 0.10.5 or later.
Note: Ethereal is considered BETA software at this time.
Disable SID Snooping
1) Select Edit --> Preferences
2) Expand the Protocols section
3) Select SMB
4) Disable the checkbox for "Snoop SID to Name mappings"
However, it is strongly encouraged to upgrade to version 0.10.5 or later.
If you are a vendor and your product is affected, let
|Vendor||Status||Date Notified||Date Updated|
|Ethereal||Affected||-||01 Sep 2004|
This vulnerability was reported by the maintainers of Ethereal.
This document was written by Damon Morda.
06 Jul 2004
Date First Published:
07 Sep 2004
Date Last Updated:
08 Oct 2004
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