Provided by Aanval (Snort & Syslog Intrusion Detection and Correlation Engine) www.aanval.com
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| GEN:SID | 1:1104 |
| Message | WEB-MISC whisker space splice attack |
| Summary | This event is generated when an attempt is made to evade an IDS in a possible web attack by sending an obfuscated request in small increments. |
| Impact | Unknown. |
| Detailed Information | Under normal circumstances, a web request fits inside a single packet. However, it is possible to obfuscate a web attack by sending the attack one character at a time. This may evade some IDS systems. Tools such as Whisker can be configured to do this. |
| Affected Systems | All Web Servers |
| Attack Scenarios | An attacker can use an automated tool, like Whisker, to launch an attack against a web server. |
| Ease of Attack | Simple. Exploits and tools are widely available. |
| Corrective Action | Check the host for signs of compromise. |
| Additional References | |
| Rule References | arachnids: 296 url: www.wiretrip.net/rfp/pages/whitepapers/whiskerids.html |
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DID:734403
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