[Snort-sigs] Signature Definition #1201, 16 of 20
Esler, Joel Contractor
EslerJ at ...785...
Mon Jun 9 10:31:46 EDT 2003
Rule: -- ATTACK-RESPONSES 403 Forbidden
Sid: -- 1201
Summary: -- This string detects "HTTP/1.1 403" in traffic in flow from
Impact: -- None
Detailed Information: -- This can show that a host was denied by the access
list defined on a webserver. A system administrator can use this
information to see if an IP did a scan for port 80 on a network. While most
people deny all access to port 80 to their network and no denies to all
their webservers. A Sysadmin that doesn't review their router logs may not
catch scans like this.
Affected Systems: -- Any that have Webservers on them
Attack Scenarios: -- Slim
Ease of Attack: -- Easy
False Positives: -- Unknown
False Negatives: -- Unknown
Corrective Action: -- Correct access lists to webpages.
Contributors: -- Joel Esler
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