Signature Detail
Short Name |
HTTP:STC:JS-DATA-SCHEME |
|---|---|
Severity |
Medium |
Recommended |
Yes |
Recommended Action |
Drop |
Category |
HTTP |
Keywords |
Javascript inspection bypass |
Release Date |
2012/12/05 |
Update Number |
2208 |
Supported Platforms |
idp-4.0+, isg-3.1.134269+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+ |
HTTP: JavaScript "data:" URL Scheme Source
This signature detects the download of a HTML document containing JavaScript using the "data:" URL scheme. This scheme is defined in RFC2397 and is a legitimate usage of HTML. However, attackers can use the scheme to first embed malware in a Web page, then bypass specific filters that normally detect such a delivery.
References