[17251] in bugtraq
Security Bulletins Digest
daemon@ATHENA.MIT.EDU (Oonk, Patrick)
Wed Oct 18 10:12:44 2000
Errors-To: support_errors@us-support.external.hp.com
Message-Id: <200010181209.e9IC9kF05900@atro.pine.nl>
Date: Wed, 18 Oct 2000 14:09:46 +0200
Reply-To: support_feedback@us-support.external.hp.com
From: "Oonk, Patrick" <patrick@PINE.NL>
To: BUGTRAQ@SECURITYFOCUS.COM
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Digest Name: Daily Security Bulletins Digest
Created: Wed Oct 18 3:00:02 PDT 2000
Table of Contents:
Document ID Title
--------------- -----------
HPSBUX0010-126 Sec. Vulnerability in Praesidium Web Proxy 1.0
The documents are listed below.
-------------------------------------------------------------------------------
Document ID: HPSBUX0010-126
Date Loaded: 20001017
Title: Sec. Vulnerability in Praesidium Web Proxy 1.0
------------------------------------------------------------------------
HEWLETT-PACKARD COMPANY SECURITY ADVISORY: #0126, 18 October '00
------------------------------------------------------------------------
The information in the following Security Advisory should be acted upon
as soon as possible. Hewlett-Packard Company will not be liable for any
consequences to any customer resulting from customer's failure to fully
implement instructions in this Security Advisory as soon as possible.
------------------------------------------------------------------------
PROBLEM: Apache 1.3.12 included in the HP Praesidium Web Proxy,
contains a vulnerability.
PLATFORM: VVOS release 10.24 and 11.04 running VirtualVault 4.0,
with HP Praesidium Proxy V1.0 only.
DAMAGE: Users can gain unauthorized file access if the proxy
were to be used to serve static web pages that exist on
the VirtualVault.
SOLUTION: Implementors of the HP Praesidium Proxy should be aware
of the vulnerability and should examine their proxy
configuration to determine if this vulnerability affects
them. If so, they should reconfigure their web server as
necessary.
AVAILABILITY: Not applicable.
------------------------------------------------------------------------
I.
A. Background
If the result of a RewriteRule is a filename that contains regular
expression references, then an attacker may be able to access any
file readable by the iwww user on the web server. Since the HP
Praesidium Web proxy runs as user iwww in group www (and not root,
as on a standard HP-UX system), the attacker would only have
access to files readable by the iwww user, www group at SYSTEM
INSIDE. The iwww user has no privileges or login access on
the VirtualVault.
Here are some example RewriteRule directives. The first two
directives are vulnerable, the last one is not.
RewriteRule /test/(.*) /usr/local/data/test-stuff/$1
RewriteRule /more-icons/(.*) /icons/$1
RewriteRule /go/(.*) http://www.otherserver.com/$1
B. Fixing the problem
Implementors of the HP Praesidium Proxy should be aware of the
vulnerability and immediately examine their proxy configuration
to determine if this vulnerability affects them. Reconfiguration
of the web server should be done as necessary.
C. Recommended solution
* The HP Praesidium Proxy should NOT be used to serve static html
content.
* Static content should be served by the SYSTEM OUTSIDE iPlanet
webserver.
* RewriteRule directives should not rewrite to a reference from
the "/" filesystem.
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________________________________________________________________________
-----End of Document ID: HPSBUX0010-126--------------------------------------
