[WEB SECURITY] UTF7 a requirement?

robert at webappsec.org robert at webappsec.org
Mon Mar 24 17:50:42 EDT 2008


Hello List,

We've seen UTF7 based xss (example google http://www.securiteam.com/securitynews/6Z00L0AEUE.html) exploited in the wild
and I'm wondering is there ever a situation where UTF7 is required for a website to work? Are there certain charsets/languages
that will not render/function properly unless UTF7 is used (I'm thinking no)?

It seems to me you could just set UTF8 as a requirement (specified in headers/meta) and avoid these utf7 xss issues. Any
encoding ninja's care to comment? 

Regards,
- Robert
http://www.cgisecurity.com/
http://www.webappsec.org/
 

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