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Red Hat Security Advisory: New vixie-cron packages available

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Date: Mon, 19 Feb 2001 15:01 -0500
Subject: [RHSA-2001:014-03] New vixie-cron packages available

                   Red Hat, Inc. Red Hat Security Advisory

Synopsis:          New vixie-cron packages available
Advisory ID:       RHSA-2001:014-03
Issue date:        2001-02-12
Updated on:        2001-02-19
Product:           Red Hat Linux
Keywords:          vixie-cron buffer overflow username crontab
Cross references:

1. Topic:

New vixie-cron packages are available that fix a buffer overflow in the 'crontab' command; this could allow certain users to gain elevated privileges.

It is recommended that all users update to the fixed packages.

Users of Red Hat Linux 6.0 or 6.1 should use the packages for Red Hat Linux 6.2.

2. Relevant releases/architectures:

Red Hat Linux 5.2 - alpha, i386, sparc
Red Hat Linux 6.2 - alpha, i386, sparc
Red Hat Linux 7.0 - alpha, i386

3. Problem description:

A buffer overflow existed in the 'crontab' command; if called by a user with a username longer than 20 characters. If the system administrator has created usernames of that length, it would be possible for those users to gain elevated privileges.

4. Solution:

To update all RPMs for your particular architecture, run:

rpm -Fvh

where is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directly *only* contains the desired RPMs.

Please note that this update is also available via Red Hat Network. Many people find this an easier way to apply updates. To use Red Hat Network, launch the Red Hat Update Agent with the following command:


This will start an interactive process that will result in the appropriate RPMs being upgraded on your system.

5. Bug IDs fixed ( for more info):

6. RPMs required:

Red Hat Linux 5.2:





Red Hat Linux 6.2:





Red Hat Linux 7.0:




7. Verification:

MD5 sum                           Package Name

3a89bffb76e4f6aa4b2f2642ba043bc7 5.2/SRPMS/vixie-cron-3.0.1-38.5.2.src.rpm
4ba62d6f55d8bbeb47e57b0a9464701b 5.2/alpha/vixie-cron-3.0.1-38.5.2.alpha.rpm
5827b0be32d899fdad229e225cbd4782 5.2/i386/vixie-cron-3.0.1-38.5.2.i386.rpm
73906a21d198cbf255c724fab8de9a21 5.2/sparc/vixie-cron-3.0.1-38.5.2.sparc.rpm
e037d33b2c605b054308b543613c9b52 6.2/SRPMS/vixie-cron-3.0.1-40.1.src.rpm
e0ab2bc7b094d65971a3acae39379e20 6.2/alpha/vixie-cron-3.0.1-40.1.alpha.rpm
12d0cc89ca909ac56774e136af0442b5 6.2/i386/vixie-cron-3.0.1-40.1.i386.rpm
4b9249539b22b0671577d738b64c4d58 6.2/sparc/vixie-cron-3.0.1-40.1.sparc.rpm
16fbd0ee65609ab35c96699089604870 7.0/SRPMS/vixie-cron-3.0.1-61.src.rpm
b0cfceed1c6d1df1229f434d7adec14d 7.0/alpha/vixie-cron-3.0.1-61.alpha.rpm
13707ef913e7801da32f9d47a419f81b 7.0/i386/vixie-cron-3.0.1-61.i386.rpm
These packages are GPG signed by Red Hat, Inc. for security. Our key is available at:

You can verify each package with the following command:
rpm --checksig

If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command:
rpm --checksig --nogpg

8. References:

Copyright(c) 2000, 2001 Red Hat, Inc.