Insecure XML-RPC handling in Zope reveals the distribution physic al location.

From: Rossen Raykov (Rossen.Raykovat_private)
Date: Tue Oct 01 2002 - 06:57:27 PDT

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    Zope versions pre 2.5.1b2 do not handle correct some XML-RPC request.

1. Summary:

Zope (www.zope.org) will reveal the complete physical location where the
server and its components are installed if it receives "incorrect" XML-RPC
requests.
In some cases it will reveal also information about the serves in the
protected LAN (10.x.x.x for example) on which current server is relaying.


2. Details:

A request like the quoted below will cause Zope to produce stack traces in
the response that will reveal the information mentioned above.

See http://collector.zope.org/Zope/359 for more details.

Ironically the quoted request was an example how to use XML-RPC.

Note that starting Zope without -D option won't stop the exposure.

telnet localhost 8080
POST /Documentation/comp_tut HTTP/1.0
Host: localhost
Content-Type: text/xml
Content-length: 93

<?xml version="1.0"?>
<methodCall>
<methodName>objectIds</methodName>
<params/>
</methodCall>


3. Vulnerable versions:
    Zope 2.3.2 - Yes (earlier versions ware not tested)
    Zope 2.4.1 (Stable) - Yes
    Zope 2.5.0 (Stable) - Yes
    Zope 2.5.1 (Stable) - Yes
    Zope 2.5.1b2 (Development) - Not
    Zope 2.6.0b1 (Development) - Not


4. Solution:
    Upgrade to 2.6.0b1 (Development) if possible.


5. Vendor information

    Notification was send to the vendor on March 22, 2002
    The issue was officially resolved on Aug 29, 2002 but only in v2.6.0.


Regards,
Rossen Raykov


---
Rossen Raykov
COGNICASE U.S.A. Inc.
(908) 860-1100 Ext. 1140
Rossen.Raykovat_private

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