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CVE-2008-1804 - Memorable Permits

Description

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.

Reference

http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=701 http://cvs.snort.org/viewcvs.cgi/snort/ChangeLog?rev=1.534.2.11 http://cvs.snort.org/viewcvs.cgi/snort/src/preprocessors/spp_frag3.c.diff?r1=text&tr1=1.46.2.4&r2=text&tr2=1.46.2.5&diff_format=h http://www.securityfocus.com/bid/29327 http://securitytracker.com/id?1020081 http://secunia.com/advisories/30348 http://www.ipcop.org/index.php?name=News&file=article&sid=40 http://secunia.com/advisories/31204 https://www.redhat.com/archives/fedora-package-announce/2008-June/msg00198.html https://www.redhat.com/archives/fedora-package-announce/2008-June/msg00167.html https://www.redhat.com/archives/fedora-package-announce/2008-June/msg00156.html http://secunia.com/advisories/30563 http://www.vupen.com/english/advisories/2008/1602 https://exchange.xforce.ibmcloud.com/vulnerabilities/42584