Trend micro - IWSVA/IWSS - Authorization module password leak

[david.vorel () honeynet cz]

There is possbile get username and password from "Proxy-Authorization" header, which is not correctly removed when 
authorization header sends WMP.

Requirements:

- IWSVA/IWSS basic authorization on
- Client is using WMP (8-11) as video player
- Standalone proxy (if upstream proxy is used, "Proxy-Authorization" header is removed by this upstream proxy)

Bug:

WMP sends authorization header in this format:

Proxy-Authorization: basic =xxxxxxxxxx

In that case IWSVA/IWSS extract correct authorization information, but it does not remove this Proxy-Authorization 
header. (it seems because of lovercase "b" in basic, even if IWSVA/IWSS knows, that this is authorization header and 
can extract correct username/password).


Scenario:

Some "bad" guy knows, that company XY use IWSVA/IWSS and basic authorization, so he sends them url with prepared video 
stream (whatever format for WMP) and waits for users access. When user access this url, "bad" guy gets whole 
"Proxy-Authorization" header which contains also base64 hash with username/password.


Happy pentesting..