[Owasp-modsecurity-core-rule-set] ESAPI HTTP request validation and ModSecurity CRS rules for XSS

Hiranmayi Palanki Hiranmayi.Palanki at aexp.com
Fri Mar 4 17:53:32 UTC 2016


I'm specifically interested in enabling just the XSS CRS rules from ModSecurity. However, I have ESAPI HTTP whitelist validation rules already running. I have the following questions:

1.      Can ModSecurity XSS CRS rules operate in parallel with ESAPI HTTP whitelist validation?

2.      Is it overkill to enable both ESAPI HTTP whitelist validation and ModSecurity XSS blacklist regex patterns?

3.      Does it make sense to split some parts of the HTTP request to go through the ESAPI canonicalize and HTTP validation rules and split some parts of the HTTP request (e.g. query string) to traverse through ModSecurity?

4.      Has anybody implemented both whitelist (through ESAPI HTTP validation) and blacklist regular expression pattern matching at the same time? If so, do you have an opinion on this combined approach?

Thank you in advance.

Hiranmayi Palanki.

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