TITLE:
Snort Back Orifice Pre-Processor Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA17220

VERIFY ADVISORY:
http://secunia.com/advisories/17220/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Snort 2.4.x
http://secunia.com/product/5691/

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

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

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