Flaw Discovered In Snort Intrusion Prevention Technology
A recently discovered security issue in Snort, the open source intrusion prevention and detection technology used in government agencies and many large corporations, could allow attackers to bypass security on compromised machines.
Researchers from Demarc, a Carpinteria, Calif.-based security vendor, discovered the flaw May 17 and released a patch earlier this week. Researchers found that while connecting to Web ports via telnet, adding a carriage return after the URL before the HTTP protocol declaration would enable Snort detection to be evaded, said Joel Ebrahimi, director of application development at Demarc.
Although there are no blatant flaws in the Snort code, this discovery is significant because it enables the URL to bypass up to 2000 Uniform Resource Identifier (URI) content rules in the Snort rule language and attack infected machines, Ebrahimi added.
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