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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 52644] New: document how SSL FakeBasicAuth works with strange characters in DNs and with groupfiles
Date Sun, 12 Feb 2012 03:39:27 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=52644

             Bug #: 52644
           Summary: document how SSL FakeBasicAuth works with strange
                    characters in DNs and with groupfiles
           Product: Apache httpd-2
           Version: 2.2.20
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Documentation
        AssignedTo: docs@httpd.apache.org
        ReportedBy: calestyo@scientia.net
    Classification: Unclassified


Hi.

Could you please share some light (and add to the documentation at
https://httpd.apache.org/docs/current/mod/mod_ssl.html#ssloptions if and how
mod_ssl's FakeBasicAuth feature works with the following:

a) Special characters
A certificates DN can contain basically _ANY_ character, including “:”, “/”, “
”, “"” or any weird Unicode character from any script.
As far as I can see this could affect us at least in the following places:
- user file
There at least the colon seems to have the special meaning of separating the
username from the password, e.g.:
/C=DE/O=GermanGrid/OU=LMU/CN=Christoph Anton
Mitterer:$apr1$7DksooGS$Mz9EkgYft12dREFb1gk8b.
Maybe “$”, “.” or the other characters mentioned above have also special
meanigns?!

Given that this is really security relevant, could you please document whether
all this is _always_ safe for any characters in the DN or not?!

Guess this would mean that the parsing has to work like this regexp ^(.*):(.*)$
and the matching must be "greedy" (i.e. the _last_ “:”) must be matched.


b) DNs in group files
Here things seem to be even more weird.
DNs typically contain “ ” characters (spaces).
The space however is the separation characters in the group files.

I found out that quoting the DN with “"” seems to work.
This is however not (yet) documented.
Further,.. is this safe? I mean, DNs could be made up tricky, containing “"” or
“:” to confuse the parsing of the group files.
This could even be a security problem.


Cheers,
Chris.

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