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Last updated: 10/24/2014 9:35:50 PM

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Vulnerability Summary for CVE-2008-1804

Original release date: 05/22/2008
Last revised: 03/07/2011


preprocessors/spp_frag3.c in Sourcefire Snort before 2.8.1 does not properly identify packet fragments that have dissimilar TTL values, which allows remote attackers to bypass detection rules by using a different TTL for each fragment.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 6.8 (MEDIUM) (AV:N/AC:M/Au:N/C:P/I:P/A:P) (legend)
Impact Subscore: 6.4
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

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External Source: SECUNIA
Name: 30563
External Source: FEDORA
Name: FEDORA-2008-4986
External Source: FEDORA
Name: FEDORA-2008-5045
External Source: IDEFENSE
Name: 20080521 Multiple Vendor Snort IP Fragment TTL Evasion Vulnerability
External Source: SECUNIA
Name: 31204
External Source: SECUNIA
Name: 30348
External Source: BID
Name: 29327
External Source: CONFIRM
Name: http://cvs.snort.org/viewcvs.cgi/snort/ChangeLog?rev=1.534.2.11
External Source: XF
Name: snort-ttl-security-bypass(42584)
External Source: CONFIRM
Name: http://cvs.snort.org/viewcvs.cgi/snort/src/preprocessors/spp_frag3.c.diff?r1=text&tr1=
External Source: SECTRACK
Name: 1020081
External Source: VUPEN
Name: ADV-2008-1602
External Source: FEDORA
Name: FEDORA-2008-5001
External Source: CONFIRM
Name: http://www.ipcop.org/index.php?name=News&file=article&sid=40

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