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Secunia Network Software Inspector 2.0 (NSI) - Public Beta

The Public Beta has ended. Thanks to all that participated.

Learn more:
http://secunia.com/network_software_inspector_2/

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TITLE:
Snort Fragmented IP Packets TTL Security Bypass

SECUNIA ADVISORY ID:
SA30348

VERIFY ADVISORY:
http://secunia.com/advisories/30348/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
Snort 2.8.x
http://secunia.com/product/16919/
Snort 2.6.x
http://secunia.com/product/13116/

DESCRIPTION:
A vulnerability has been reported in Snort, which can be exploited by
malicious people to bypass certain security restrictions.

The vulnerability is caused due to an error in the processing of
fragmented IP packets. This can be exploited to bypass Snort rules by
sending fragmented IP packets with an overly large TTL (Time To Live)
difference between fragments.

The vulnerability is reported in versions 2.6 and 2.8. Prior versions
may also be affected.

SOLUTION:
Update to version 2.8.1.

PROVIDED AND/OR DISCOVERED BY:
Silvio Cesare, reported via iDefense

ORIGINAL ADVISORY:
iDefense:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=701

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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Please Note:
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Secunia NEVER sends attached files with advisories.
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