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Category:   Application (Generic)  >   Cisco Snort Vendors:
Snort TCP/IP Options Bug Lets Remote Users Deny Service
SecurityTracker Alert ID:  1012656
SecurityTracker URL:
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Dec 23 2004
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): prior to 2.3.0-RC1
Description:   A denial of service vulnerability was reported in Snort. A remote user can cause the target service to crash.

The vendor reported that there is a flaw in the printing of TCP/IP options in 'src/decode.c'. A remote user can send specially crafted packets to cause the target system to crash.

Marcin Zgorecki is credited with reporting this flaw.

A demonstration exploit by Antimatt3r is available at:

Impact:   A remote user can cause the target service to crash.
Solution:   The vendor has issued a fixed version (2.3.0-RC1), available at:

Vendor URL: (Links to External Site)
Cause:   Exception handling error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   None.

 Source Message Contents

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