Signature Detail
Short Name |
HTTP:EXPLOIT:ILLEGAL-HOST-CHAR |
|---|---|
Severity |
Medium |
Recommended |
Yes |
Category |
HTTP |
Keywords |
Illegal Characters in Host Header Field |
Release Date |
2004/06/23 |
Update Number |
1213 |
Supported Platforms |
di-5.3+, idp-4.0+, isg-3.0+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+ |
HTTP: Illegal Characters in Host Header Field
This signature detects illegal characters in a Host header field of an HTTP/1.1 request. Attackers can send an HTTP link, that, when selected by the user, generates an HTTP request to a malicious Web site. In your logs, the destination IP address for the event can be the malicious Web site; however, some foreign Web sites can also trigger this signature, creating a false positive.
Extended Description
Illegal characters in the host header field in an HTTP response could indicate an attempted attack.
References