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Snort Back Orifice Pre-Processor Buffer Overflow Vulnerability Advisory Available in Danish 

Secunia Advisory: SA17220  
Release Date: 2005-10-18
Last Update: 2005-11-14

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:Snort 2.4.x

CVE reference:CVE-2005-3252 (Secunia mirror)

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Description:
Neel Mehta has reported a vulnerability in Snort, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the handling of Back Orifice packets. This can be exploited by sending a maliciously crafted UDP packet to a network or device protected by or running an IDS or IPS system based on Snort.

The vulnerability has been reported in Snort version 2.4.0 , 2.4.1, and 2.4.2. Other versions may also be affected.

Solution:
Upgrade to version 2.4.3.

Alternatively, disable the Back Orifice pre-processor.

Provided and/or discovered by:
Neel Mehta, ISS X-Force

Changelog:
2005-11-14: Added CVE reference.

Original Advisory:
Snort:
http://www.snort.org/pub-bin/snortnews.cgi#99

X-Force:
http://xforce.iss.net/xforce/alerts/id/207

Other References:
US-CERT VU#175500:
http://www.kb.cert.org/vuls/id/175500



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

4 Related Secunia Security Advisories

1. Snort Rule Matching Backtrack Denial of Service Vulnerability
2. Snort "http_inspect" Preprocessor Bypass Vulnerability
3. Snort frag3 Preprocessor Packet Reassembly Vulnerability
4. Snort TCP SACK Option Handling Denial of Service


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If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.

Ideas, suggestions, and other feedback are most welcome.








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