6513814 2001-05-17 13:15 -0700  /111 rader/ TurboLinux Security Team <security@www.turbolinux.com>
Bilagans filnamn: "vixie-cron.adv"
Importerad: 2001-05-18  10:55  av Brevbäraren
Extern mottagare: bugtraq@securityfocus.com
Mottagare: Bugtraq (import) <17081>
Bilaga (text/plain) till text 6513805
Ärende: Bilaga (vixie-cron.adv) till: Turbolinux Security Advisories
------------------------------------------------------------


_____________________________________________________________________________________________

                     TurboLinux Security Announcement

        Package:  vixie-cron Vulnerable Packages: All Turbolinux
        versions previous to 3.0.1-46 Date: 05/02/2001 5:00 PDT


        Affected TurboLinux versions: TL Server 6.5,
                                      TL 6.1 WorkStation,
                                      All TurboLinux versions
                                      6.0.5 and earlier

        TurboLinux Advisory ID#:  TLSA2001012

        Credits: Vulnerability first discovered by
        flatline<achter05@ie.hva.nl> References:
        http://marc.theaimsgroup.com/?l=bugtraq&m=98200814418344&w=2

_____________________________________________________________________________________________

A security hole has been discovered in the package vixie-cron.
Please update the packages in your installation as soon as possible.
_____________________________________________________________________________________________

1. Problem Summary

   There is a buffer overflow vulnerability associated with the
   crontab function.  When crontab determines the name of the user
   calling the crontab function, it stores this name in a 20 byte
   buffer using the strcpy() function, which does no bounds checking.
   The command "useradd" accepts more than 20 characters.  Therefore,
   a username greater than 20 characters will crash a system when
   passed to the crontab function.

2. Impact

   It is possible for a local user to gain elevated privileges.

3. 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/vixie-cron-3.0.1-46.i386.rpm

   The source RPM can be downloaded here:

   ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/vixie-cron-3.0.1-46.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
---------------------------------------------------------------------------------------------
                                       
  c79c05f0044f88812908b17730a308ee	vixie-cron-3.0.1-46.i386.rpm
  cdfd064650b8839a3d7f3eb18a494165      vixie-cron-3.0.1-46.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:

 rpm --checksig --nogpg 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 TL6.0 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
(6513814) /TurboLinux Security Team <security@www.turbolinux.com>/(Ombruten)