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                     Turbolinux Security Announcement

       			       Adore Worm
     
        Vulnerable Turbolinux platforms:  TL Workstation 6.1
                                          Turbolinux Server versions 6.0.5
                                          and earlier
                                      
        Turbolinux Advisory ID#:  TLSA2001017
                  
        References:  http://www.securityfocus.com/headlines/10964 


____________________________________________________________________________________________
_

Although we have not received any security alerts about Turbolinux systems
 being infected
by the Adore Worm, the Turbolinux platforms mentioned above can be susceptible
 to it. Please
take the proper precaution by updating the packages in your installation as
 soon as possible.
____________________________________________________________________________________________
_

1. Problem Summary

   Adore is a variant of the Ramen worm that creates a backdoor to a Linux
 system.  It 
   then sends information about the compromised system to four email addresses:
  two in the
   United States and two in China.  The worm gets its name from the username
 associated 
   with each email address:  adore9000 or adore9001. 

   To create this backdoor, the Adore worm seeks out four flaws associated with
 the packages
   nfs-utils, wu-ftpd, LPRng, and bind.  

   The four security flaws sought out by the Adore worm are:

	a. wu-ftpd:  Buffer overrun;  due to improper bounds checking, SITE EXEC may 
                     enable remote root execution, without having any local
 user account 
                     required.

        b. nfs-utils:  Flaw in the rpc.statd daemon can lead to remote root
 break in.
                       Please note that the nfs-utils package will replace the 
                       packages knfsd and knfsd-client.  The package
 knfsd-client
                       contains the rpc.statd daemon.

        c. LPRng:  Vulnerability due to incorrect usage of the syslog()
 function.
                   Local and remote users can send string-formatting operators
 to the print-
                   er daemon to corrupt the daemon's execution, potentially
 gaining root
                   access.

        d. bind:  Buffer overflow in transaction signature (TSIG) handling
 code.
                  This vulnerability may allow an attacker to execute code with
 the same
                  privileges as the BIND server. Because BIND is typically run
 by a
                  superuser account, the execution would occur with superuser
 privileges.

   Once in a system, it replaces an application called PS--used by
 administrators to list the 
   currently running programs on a system--with a copy that will list all
 programs except the 
   worm.  It also sends important system files to the four email addresses. 
 After infecting a 
   machine and sending information about the computer through e-mail, the worm
 waits until 
   4:02 a.m. and then deletes all its files, except the backdoor. 


2. Solution

   Update the packages from our ftp server by running the following
   command:

   rpm -Uvh ftp_path_to_filename

   Where ftp_path_to_filename is the following:

ftp://ftp.turbolinux.com/pub/updates/6.0/security/nfs-utils-0.2.1-7.i386.rpm
ftp://ftp.turbolinux.com/pub/updates/6.0/security/wu-ftpd-2.6.1-5.i386.rpm
ftp://ftp.turbolinux.com/pub/updates/6.0/security/LPRng-3.6.26-1.i386.rpm
ftp://ftp.turbolinux.com/pub/updates/6.0/security/bind-8.2.3-2.i386.rpm
ftp://ftp.turbolinux.com/pub/updates/6.0/security/bind-contrib-8.2.3-2.i386.rpm
ftp://ftp.turbolinux.com/pub/updates/6.0/security/bind-devel-8.2.3-2.i386.rpm
ftp://ftp.turbolinux.com/pub/updates/6.0/security/bind-utils-8.2.3-2.i386.rpm


   The source RPMs can be downloaded here:

   ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/nfs-utils-0.2.1-7.src.rpm
   ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/wu-ftpd-2.6.1-5.src.rpm
   ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/LPRng-3.6.26-1.src.rpm
   ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/bind-8.2.3-2.src.rpm

  **Note: You must rebuild and install the RPM if you choose to download
  and install the SRPM.  Simply installing the SRPM alone WILL NOT CLOSE
  THE SECURITY HOLE.

 Please verify the MD5 checksums of the updates before you install:

  MD5 sum                               Package Name
--------------------------------------------------------------------------------------------
-

  a11507768f746e6dfbe1b55705ac9b0a      wu-ftpd-2.6.1-5.i386.rpm
  aec472f299ad23e8e1030f3aeb6733c7      wu-ftpd-2.6.1-5.src.rpm
  ddb4b4c0d50650c4a8acc5692b8c0f1a      nfs-utils-0.2.1-7.i386.rpm
  948e3c6b45db0d18b57713572575d6c8      nfs-utils-0.2.1-7.src.rpm
  b4366ecf26b2156d9de3c0bbdce320ca      LPRng-3.6.26-1.i386.rpm
  a6d6ce0f0291ba42d7fa4ef063bc1107      LPRng-3.6.26-1.src.rpm
  dec967e3a1dd16bdcca0c6fe6e9114d6      bind-8.2.3-2.i386.rpm
  2e84bbbcd6a09d7c5060dd01480ff3de      bind-contrib-8.2.3-2.i386.rpm
  06612093126372f8d618ea842fd402ec      bind-devel-8.2.3-2.i386.rpm
  3f390ce4d1b7ceaa477df62cc3fe3174      bind-utils-8.2.3-2.i386.rpm
  25c701c7158af3f773d1a478c8872d05      bind-8.2.3-2.src.rpm
____________________________________________________________________________________________
_

These packages are GPG signed by Turbolinux for security. Our key
is available here:

 http://www.turbolinux.com/security/tlgpgkey.asc

To verify a package, use the following command:

 rpm --checksig name_of_rpm

To examine only the md5sum, use the following command:

 md5sum name_of_rpm

**Note: Checking GPG keys requires RPM 3.0 or higher.

_______________________________________________________________________________________________
_

You can find more updates on our ftp server:

   ftp://ftp.turbolinux.com/pub/updates/6.0/security/ 

for TL6.x Workstation and Server security updates

Our webpage for security announcements:

   http://www.turbolinux.com/security

If you want to report vulnerabilities, please contact:

   security@turbolinux.com
_______________________________________________________________________________________________
_

Subscribe to the Turbolinux Security Mailing lists:

  TL-security - A moderated list for discussing security issues
                Turbolinux products.
  Subscribe at http://www.turbolinux.com/mailman/listinfo/tl-security

  TL-security-announce - An announce-only mailing list for security
                         updates and alerts.

  Subscribe at:

      http://www.turbolinux.com/mailman/listinfo/tl-security-announce

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