Signature Detail
Short Name |
HTTP:EXT:FILE-EXT-IN-DIR |
|---|---|
Severity |
Medium |
Recommended |
No |
Category |
HTTP |
Release Date |
2004/08/25 |
Update Number |
1213 |
Supported Platforms |
idp-4.0+, isg-3.0+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+ |
HTTP: File Extension in Directory Name
This signature detects HTTP requests that contain a well-known internet file extension being used as a directory. Attackers can use these HTTP requests to hide malicious content in a benign file format. For example, an attacker can disguise a link to a directory containing a malicious HTML file as a link to an image file.
Extended Description
An HTTP request that contains a directory name string consisting of a file extension may be used to trick a user as to what a link is referencing.
References