Hello people,
since 2.0.55 a reverse SSL-proxy (on Windows 2000) which I setup for MS
Exchange 2003 Outlook Web Access makes problems. The users stumbled over the
problem that they cannot attach files to their emails. I tried it myself: the
attachment seems to be uploaded to the server, but is not "registered" by
Exchange.
If I downgrade to 2.0.54 + OpenSSL 0.9.8 (I changed Apache while back to make
that compilation possible) it works fine again.
I really suspect this change to be the culprit:
"SECURITY: CAN-2005-2088 (cve.mitre.org)
proxy: Correctly handle the Transfer-Encoding and Content-Length
headers. Discard the request Content-Length whenever T-E: chunked
is used, always passing one of either C-L or T-E: chunked whenever
the request includes a request body. Resolves an entire class of
proxy HTTP Request Splitting/Spoofing attacks. [William Rowe]"
Has anyone run or _not_ run into this problem with this configuration?
Here's part of the conf:
LoadModule proxy_module modules/mod_proxy.so
ProxyRequests Off
LoadModule proxy_http_module modules/mod_proxy_http.so
<VirtualHost _default_:443>
ServerName owa.server
SSLEngine On
SSLProxyEngine on
ProxyVia On
ProxyPass / https://owa.server
ProxyPassReverse / https://owa.server
SSLCertificateKeyFile c:/apache/conf/ssl/owa.pem
SSLCertificateFile c:/apache/conf/ssl/owa.crt
CustomLog "|c:/apache/bin/rotatelogs.exe c:/log/%Y%m%d_owa.log 86400"
combined
<Location />
Allow from All
AuthType Basic
AuthName "OWA"
AuthUserFile conf/owa-passwords
Require valid-user
</Location>
</VirtualHost>
The internal ip of "owa.server" is setup in the hosts file to facilitate the
generation of correct URLs by Exchange (as suggested in
http://www.soft-land.org/articoli/exch).
Regards, Manuel Martin
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