LinuxSecurity.com
Share your story
The central voice for Linux and Open Source security news
Home News Topics Advisories HOWTOs Features Newsletters About Register

Welcome!
Sign up!
EnGarde Community
Login
Polls
What is the most important Linux security technology?
 
Advisories
Community
Linux Events
Linux User Groups
Link to Us
Security Center
Book Reviews
Security Dictionary
Security Tips
SELinux
White Papers
Featured Blogs
All About Linux
DanWalsh LiveJournal
Securitydistro
Latest Newsletters
Linux Security Week: April 21st, 2014
Linux Security Week: April 7th, 2014
Subscribe
LinuxSecurity Newsletters
E-mail:
Choose Lists:
About our Newsletters
RSS Feeds
Get the LinuxSecurity news you want faster with RSS
Powered By

  
Gentoo: Webmin, Usermin Remote code execution through Print E-mail
User Rating:      How can I rate this item?
Posted by Benjamin D. Thomas   
Gentoo If Webmin or Usermin is configured to use full PAM conversations, it is vulnerable to the remote execution of arbitrary code with root privileges.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200509-17
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: High
     Title: Webmin, Usermin: Remote code execution through PAM
            authentication
      Date: September 24, 2005
      Bugs: #106705
        ID: 200509-17

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

If Webmin or Usermin is configured to use full PAM conversations, it is
vulnerable to the remote execution of arbitrary code with root
privileges.

Background
==========

Webmin and Usermin are web-based system administration consoles. Webmin
allows an administrator to easily configure servers and other features.
Usermin allows users to configure their own accounts, execute commands,
and read e-mails.

Affected packages
=================

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  app-admin/webmin        < 1.230                          >= 1.230
  2  app-admin/usermin       < 1.160                          >= 1.160
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

Description
===========

Keigo Yamazaki discovered that the miniserv.pl webserver, used in both
Webmin and Usermin, does not properly validate authentication
credentials before sending them to the PAM (Pluggable Authentication
Modules) authentication process. The default configuration shipped with
Gentoo does not enable the "full PAM conversations" option and is
therefore unaffected by this flaw.

Impact
======

A remote attacker could bypass the authentication process and run any
command as the root user on the target server.

Workaround
==========

Do not enable "full PAM conversations" in the Authentication options of
Webmin and Usermin.

Resolution
==========

All Webmin users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-admin/webmin-1.230"

All Usermin users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-admin/usermin-1.160"

References
==========

  [ 1 ] CAN-2005-3042
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-3042
  [ 2 ] Original Advisory

http://www.lac.co.jp/business/sns/intelligence/SNSadvisory_e/83_e.html

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200509-17.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2005 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.0
 
< Prev   Next >
    
Partner

 

Latest Features
Peter Smith Releases Linux Network Security Online
Securing a Linux Web Server
Password guessing with Medusa 2.0
Password guessing as an attack vector
Squid and Digest Authentication
Squid and Basic Authentication
Demystifying the Chinese Hacking Industry: Earning 6 Million a Night
Free Online security course (LearnSIA) - A Call for Help
What You Need to Know About Linux Rootkits
Review: A Practical Guide to Fedora and Red Hat Enterprise Linux - Fifth Edition
Yesterday's Edition
Fixing OpenSSL's Heartbleed flaw will take MONTHS, warns Secunia
Even the most secure cloud storage may not be so secure, study finds
Targeted Attack Uses Heartbleed to Hijack VPN Sessions
Partner Sponsor

Community | HOWTOs | Blogs | Features | Book Reviews | Networking
 Security Projects |  Latest News |  Newsletters |  SELinux |  Privacy |  Home
 Hardening |   About Us |   Advertise |   Legal Notice |   RSS |   Guardian Digital
(c)Copyright 2014 Guardian Digital, Inc. All rights reserved.