__________________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Capability
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__________________________________________________________
INFORMATION BULLETIN
Vulnerabilities in Webmin/Usermin
[HPSBUX0303-250]
March 18, 2003 21:00 GMT Number N-058
______________________________________________________________________________
PROBLEM: miniserv.pl in (1) Webmin before 1.070 and (2) Usermin before
1.000 does not properly handle metacharacters such as line
feeds and carriage returns (CRLF) in Base-64 encoded strings
during Basic authentication.
PLATFORM: HP9000 Servers running HP-UX release 11.00, 11.11, 11.20, and
11.22
hp apache-based web server, 1.3.27.00 or earlier
hp apache-based web server, 2.0.43.00 or earlier
hp-ux webmin-based admin, v.1.0.00.01 or earlier
DAMAGE: Remote attackers could potentially spoof a session ID and
potentially gain root privileges.
SOLUTION: Install product bundles or apply workarounds.
______________________________________________________________________________
VULNERABILITY The risk is HIGH. Remote access to the web administrator
ASSESSMENT: program could act as a pipeline to the server for an attacker.
______________________________________________________________________________
LINKS:
CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/n-058.shtml
______________________________________________________________________________
[***** Start HPSBUX0303-250 *****]
Document ID: HPSBUX0303-250
Date Loaded: 20030317
Title: SSRT3523 Sec. Vulnerability in Webmin/Usermin
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Hash: SHA1
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Source: HEWLETT-PACKARD COMPANY
SECURITY BULLETIN: HPSBUX0303-250
Originally issued: 17 March 2003
SSRT3523 Sec. Vulnerabilities in Webmin/Usermin
-----------------------------------------------------------------
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: Potential vulnerability regarding miniserv.pl in
(1) Webmin before 1.070, and
(2) Usermin before 1.000 does not properly handle
metacharacters such as line feeds and carriage returns
(CRLF) in Base-64 encoded strings during Basic
authentication, which allows remote attackers to
potentially spoof a session ID and potentially gain root
privileges.
Note: Usermin is currently not shipped in any of the products
mentioned below.
More details are available at:
<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0101>
IMPACT: Potential to increase privileges from remote.
PLATFORM: HP9000 Servers running HP-UX release 11.00, 11.11,
11.20, and 11.22 with versions of the following products
are affected, and represented as:
product-name, version (product-tag/bundle-tag)
- hp apache-based web server, 1.3.27.00 or earlier
(ApacheStrong/B9415AA)
This product includes Webmin 0.980.
- hp apache-based web server, 2.0.43.00 or earlier
(HPApache/B9416AA, HPApache/B9416BA)
This product includes Webmin 0.980.
- hp-ux webmin-based admin, v.1.0.00.01 or earlier
(hpuxwsWEBMIN/hpuxwsWebmin)
This product includes Webmin 1.020
SOLUTION: For HP-UX releases 11.00, 11.11, 11.20 and 11.22
download new HP Apache product from
<http://www.software.hp.com/>:
For ApacheStrong/B9415AA download the following:
- hp apache-based web server, 1.3.27.01
(ApacheStrong/B9415AA)
This product includes Webmin 1.070.
<http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/
cgi/displayProductInfo.pl?productNumber=B9415AA132701>
For HPApache/B9416AA, HPApache/B9416BA and
hpuxwsWEBMIN/hpuxwsWebmin download the following:
- hp-ux webmin-based admin, v.1.0.01.01 or later
(hpuxwsWebmin/hpuxwsWebmin)
This product includes Webmin 1.070.
<http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/
cgi/displayProductInfo.pl?productNumber=HPUXWSSUITE>
NOTE: No IPv6 solution is available at this time.
This Security Bulletin will be updated when such
becomes available.
MANUAL ACTIONS: Yes - Update
Install the product containing the fix.
For customers with HPApache/B9416AA or
HPApache/B9416BA installed, the fix requires
migration to hpuxwsWEBMIN/hpuxwsWebmin and
removing the affected products from the system.
AVAILABILITY: Complete product bundles are available now on
<http://www.software.hp.com/>
-----------------------------------------------------------------
A. Background
The Common Vulnerabilities and Exposures project
<http://cve.mitre.org/> has identified multiple potential
vulnerabilities in the Webmin GUI Administration tool
(CAN-2003-0101). It affects the following HP product
numbers/versions on HP-UX releases 11.00, 11.11, 11.20
and 11.22::
- hp apache-based web server, 1.3.27.00 or earlier
(ApacheStrong/B9415AA)
- hp apache-based web server, 2.0.43.00 or earlier
(HPApache/B9416AA, HPApache/B9416BA)
- hp-ux webmin-based admin, v.1.0.00.01 or earlier
(hpuxwsWEBMIN/hpuxwsWebmin)
B. Recommended solution
The Webmin Group has released Webmin 1.070 as the best known
version that fixes the problems identified in the above
mentioned issues.
For customers using ApacheStrong/B9415AA, HP has incorporated
Webmin 1.070 in the following products:
- B9415AA: hp apache-based web server 1.3.27.01
This product includes Webmin 1.070.
For customers using HPApache/B9416AA, HPApache/B9416BA and
hpuxwsWEBMIN/hpuxwsWebmin, HP has incorporated Webmin 1.070
in the following products:
- hpuxwsWebmin: hp-ux webmin-based admin v.1.0.01.01 or
later;
This product includes Webmin 1.070.
NOTE: No IPv6 solution is available at this time. This Security
Bulletin will be updated when such becomes available.
Check for Webmin Installation
-----------------------------
To determine if the Webmin GUI Administration Tool from HP
is installed on your system, use Software Distributor's swlist
command. Since Webmin is not visible at the "product" level
for products prior to hpuxwsWEBMIN, search for Apache as well.
All versions of products may co-exist on a single system.
For example, the results of the commands:
swlist -l product | grep -i webmin
hpuxwsWEBMIN A.1.0.00.01 HP-UX Webmin-based Admin
swlist -l product | grep -i apache
ApacheStrong 1.3.19.21 HP Apache-based Web Server
with Strong (128bit) Encryption
HPApache 2.0.39.01.02 HP Apache-based Web Server
In the above examples, all of these need to be updated.
Stop Webmin
-----------------------------
Before updating, make sure to stop any previous Webmin binary.
Otherwise, the previous binary will continue running,
preventing the new one from starting, although the installation
would be successful.
After determining which Webmin is installed, stop Webmin with
the following commands:
for ApacheStrong: /opt/apache/webmin/webmin-init stop
for HPApache: /opt/hpapache2/webmin/webmin-init stop
for hpuxwsWEBMIN: /opt/hpws/webmin/webmin-init stop
Since Webmin is bundled with Apache for products prior to
hpuxwsWEBMIN, Apache also needs to be stopped.
for ApacheStrong: /opt/apache/bin/apachectl stop
for HPApache: /opt/hpapache2/bin/apachectl stop
Download and Install Webmin/Apache
-----------------------------
- Download Webmin/Apache from Software Depot using the
previously mentioned links.
- Verify successful download by comparing the cksum with the
value specified on the installation web page.
- Use SD to swinstall the depot.
- For customers with HPApache/B9416AA or HPApache/B9416BA
installed, migrate to hpuxwsWEBMIN/hpuxwsWebmin and
remove the affected products from the system.
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.
Removing Webmin Installation
----------------------------
If you rather remove Webmin from your system than install a
newer version to resolve the security problem, use both
Software Distributor's "swremove" command and also "rm -rf" the
home location as specified in the rc.config.d file "HOME"
variables.
To find the files containing HOME variables in the
/etc/rc.config.d directory:
For ApacheStrong/B9415AA, HPApache/B9416AA, and
HPApache/B9416BA when removing Webmin, you will also remove
Apache.
%ls /etc/rc.config.d | grep apache
apacheconf
hpapache2conf
NOTE: For HP Apache 1.3.x, you must manually remove the
Apache directory in addition to the Tomcat directory.
Apache is under directory "/opt/apache" for
HP Apache 1.3.x.
For hpuxwsWebmin/hpuxwsWebmin:
%ls /etc/rc.config.d | grep webmin
hpws_webminconf
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To -subscribe- to future HP Security Bulletins or other
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The Security Patch Check tool can verify that a security
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For information on the Security Patch Check tool, see:
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displayProductInfo.pl?productNumber=B6834AA
The security patch matrix is also available via anonymous
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The PGP key used to sign this bulletin is available from
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(c)Copyright 2003 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.
________________________________________________________________
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[***** End HPSBUX0303-250 *****]
_______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Hewlett-Packard for the
information contained in this bulletin.
_______________________________________________________________________________
CIAC, the Computer Incident Advisory Capability, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
Institutes of Health (NIH). CIAC is located at the Lawrence Livermore
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