Apache discloses source code via POST requests to a location with WebDAV and CGI enabled

Overview

There is an information leakage in Apache that results from an interaction between WebDAV and CGI.

Description

Apache version 2.0.42 allows remote attackers to obtain the source code of CGI scripts that are stored in locations for which both CGI and WebDAV are enabled. When a POST request is sent to a CGI script on an affected server, this vulnerability will cause the source code of the script to be returned to the attacker.

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Impact

Remote attackers can obtain the source code of CGI scripts located on affected servers.

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Solution

Apply a patch from your vendor

This vulnerability was addressed in Apache version 2.0.43, available at http://httpd.apache.org/download.cgi. For vendor-specific information regarding this issue, please see the Systems Affected section of this document.

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Vendor Information

910713

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Apache __ Affected

Notified: September 26, 2002 Updated: October 29, 2002

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

This vulnerability was addressed in Apache version 2.0.43, available at http://httpd.apache.org/download.cgi.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23910713 Feedback>).

Hewlett-Packard Company __ Affected

Notified: October 28, 2002 Updated: November 19, 2002

Status

Affected

Vendor Statement

Document ID: HPSBUX0210-224 Date Loaded: 20021029 Title: Sec. Vulnerability in Apache

`-----------------------------------------------------------------
Source: HEWLETT-PACKARD COMPANY
SECURITY BULLETIN: HPSBUX0210-224
Originally issued: 30 Oct 2002
SSRT 2393 Apache Vulnerabilities

NOTICE: There are no restrictions for distribution of this Bulletin
provided that it remains complete and intact.
The information in the following Security Bulletin 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
Bulletin as soon as possible.
------------------------------------------------------------------
PROBLEM: Vulnerability regarding ownership permissions of System V
shared memory based scoreboards. The fix resulted in the
new ShmemUIDisUser directive. (CERT Vul. Note VU#825353
and CVE CAN-2002-0839)
Cross-site scripting vulnerability in the default error
page when using wildcard DNS. (CERT Vul. Note VU#240329
and CVE CAN-2002-0840)
Vulnerability regarding some possible overflows in ab.c
which could be exploited by a malicious server.
(CERT Vul. Note VU#858881 and CVE CAN-2002-0843)
Fix the exposure of CGI source when a POST request is sent
to a location where both DAV and CGI are enabled.
(CERT Vul. Note VU#910713 and CVE CAN-2002-1156)
IMPACT: Potential for increased privilege, denial of service (DoS),
or execution of arbitrary code.
PLATFORM: HP9000 Servers running HP-UX release 11.00, 11.11, 11.20,
and 11.22 with versions 1.3.26.05 or 2.0.39.05 and earlier,
of the HP Apache product installed are affected.
SOLUTION: For HP-UX releases 11.00, 11.11, 11.20 and 11.22 as well
as release 11.11 running IPv6, download new HP Apache
product (1.3.27.00 or 2.0.43.00 or later) from
<http://www.software.hp.com>.
MANUAL ACTIONS: Yes - Update
Install repaired binary upgrading to
Apache 2.0.43.00 or Apache 1.3.27.00.
AVAILABILITY: Complete product bundles are available now on
<http://www.software.hp.com>.
------------------------------------------------------------------
A. Background
The Common Vulnerabilities and Exposures project (cve.mitre.org)
has identified multiple vulnerabilities in the Apache HTTP
Server. It affects the following HP product numbers:
B9415AA Apache 1.3.x HP-UX releases 11.00 and 11.11
B9416AA Apache 2.x HP-UX releases 11.00 and 11.11
B9415AA Apache 1.3.x HP-UX releases 11.20 and 11.22
B9416AA Apache 2.x HP-UX releases 11.20 and 11.22
B9416BA Apache 2.x IPv6 HP-UX release 11.11
With this release HP has upgraded to Apache 2.0.43 and
Apache 1.3.27, and fixes certain known vulnerabilities in the
Apache HTTP Server.
The release incorporates fix for the following problems:
CAN-2002-0839 : Apache 1.3.26
CAN-2002-0840 : Apache 1.3.26 and Apache 2.0.39
CAN-2002-0843 : Apache 1.3.26 and Apache 2.0.39
CAN-2002-1156 : Apache 2.0.39
More details on this information can be found at
<http://www.apache.org>.
The CVE issues can be found at <http://cve.mitre.org>
The Apache Group has released Apache 2.0.43 and Apache
1.3.27 as the best known version that fixes the problems
identified in the above mentioned CVE issues.
Before updating, make sure to stop any previous HP Apache binary.
Otherwise, the previous binary will continue running, preventing
the new one from automatically starting, although the
installation would be successful.
The command to stop the HP Apache binary is:
for 1.3.26:
/opt/apache/bin/apachectl stop
for 2.0.39:
/opt/hpapache2/bin/apachectl stop
HP Apache automatically starts upon installation if port 80
is available.
Installation of this new version of HP Apache over an existing
HP Apache installation is supported, while installation over a
non-HP Apache is NOT supported.
B. Fixing the problem
The fixes for all HP-UX versions are in the form of new product
bundles, instead of patches. To retrieve them, go to
<http://www.software.hp.com/ISS_products_list.html&gt;
Install HP Apache versions 1.3.27.00 or 2.0.43.00 or later.
Note: OpenView Network Node Manager (NNM) customers should not
install these versions. The version of Apache delivered
with NNM is under investigation. This bulletin will be
updated when more information is available.
`

C. To subscribe to automatically receive future NEW HP Security Bulletins from the HP IT Resource Center via electronic mail, do the following:
Use your browser to get to the HP IT Resource Center page at:
<http://itrc.hp.com>
Use the 'Login' tab at the left side of the screen to login using your ID and password. Use your existing login or the "Register" button at the left to create a login, in order to gain access to many areas of the ITRC. Remember to save the User ID assigned to you, and your password.
In the left most frame select "Maintenance and Support".
Under the "Notifications" section (near the bottom of the page), select "Support Information Digests".
To -subscribe- to future HP Security Bulletins or other Technical Digests, click the check box (in the left column) for the appropriate digest and then click the "Update Subscriptions" button at the bottom of the page.
or
To -review- bulletins already released, select the link (in the middle column) for the appropriate digest.
To -gain access- to the Security Patch Matrix, select the link for "The Security Bulletins Archive". (near the bottom of the page) Once in the archive the third link is to the current Security Patch Matrix. Updated daily, this matrix categorizes security patches by platform/OS release, and by bulletin topic. Security Patch Check completely automates the process of reviewing the patch matrix for 11.XX systems.
For information on the Security Patch Check tool, see: <http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/> displayProductInfo.pl?productNumber=B6834AA
The security patch matrix is also available via anonymous ftp:
<ftp://ftp.itrc.hp.com/export/patches/hp-ux_patch_matrix/>
On the "Support Information Digest Main" page: click on the "HP Security Bulletin Archive".
D. To report new security vulnerabilities, send email to
[email protected]
Please encrypt any exploit information using the security-alert PGP key, available from your local key server, or by sending a message with a -subject- (not body) of 'get key' (no quotes) to [email protected].
------------------------------------------------------------------
(c) Copyright 2002 Hewlett-Packard Company Hewlett-Packard Company shall not be liable for technical or editorial errors or omissions contained herein. The information in this document is subject to change without notice. Hewlett-Packard Company and the names of HP products referenced herein are trademarks and/or service marks of Hewlett-Packard Company. Other product and company names mentioned herein may be
trademarks and/or service marks of their respective owners.
________________________________________________________________ -----End of Document ID: HPSBUX0210-224--------------------------------------

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23910713 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.apacheweek.com/issues/02-10-04&gt;
• <http://www.apache.org/dist/httpd/CHANGES_2.0&gt;
• <http://nagoya.apache.org/bugzilla/show_bug.cgi?id=13025&gt;
• <http://www.securityfocus.com/bid/6065&gt;

Acknowledgements

This document was written by Jeffrey P. Lanza and is based upon information provided by Apache.org.

Other Information

CVE IDs:	CVE-2002-1156
Severity Metric:	16.88 Date Public: