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Red Hat Security Advisory: New majordomo packages available

May 31, 2000, 19:22 (0 Talkback[s])

Date: Wed, 31 May 2000 11:11 -0400
From: bugzilla@redhat.com
To: redhat-watch-list@redhat.com
Subject: [RHSA-2000:005-05] New majordomo packages available


                   Red Hat, Inc. Security Advisory

Synopsis:          New majordomo packages available
Advisory ID:       RHSA-2000:005-05
Issue date:        2000-01-20
Updated on:        2000-05-31
Product:           Red Hat Powertools
Keywords:          majordomo
Cross references:  N/A

1. Topic:

New majordomo packages are available to fix local security problems in majordomo.

2. Relevant releases/architectures:

Red Hat Powertools 6.1 - i386 alpha sparc

3. Problem description:

A vulnerability in /usr/lib/majordomo/resend and /usr/lib/majordomo/wrapper will allow execution of arbitrary commands with elevated privileges.

It is recommended that all users of Red Hat Linux using the majordomo package upgrade to the fixed package, which will resolve the vulnerability in /usr/lib/majordomo/resend. To secure /usr/lib/majodomo/wrapper, please read the solution section below.

Once an official patch has been released by the majordomo maintainers, we will release an updated package which will fix both vulnerabilities.

4. Solution:

For each RPM for your particular architecture, run:

rpm -Fvh [filename]

where filename is the name of the RPM.

Once the package is installed, become "root" and execute this command:

chmod o-x /usr/lib/majordomo/wrapper

5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):

N/A

6. RPMs required:

Red Hat Powertools 6.1:

intel:
ftp://ftp.redhat.com/redhat/updates/powertools/6.1/i386/majordomo-1.94.5-2.i386.rpm

alpha:
ftp://ftp.redhat.com/redhat/updates/powertools/6.1/alpha/majordomo-1.94.5-2.alpha.rpm

sparc:
ftp://ftp.redhat.com/redhat/updates/powertools/6.1/sparc/majordomo-1.94.5-2.sparc.rpm

sources:
ftp://ftp.redhat.com/redhat/updates/powertools/6.1/SRPMS/majordomo-1.94.5-2.src.rpm

7. Verification:

MD5 sum                           Package Name

ad994a1742d90a593b8ecfbf52634cd7 6.1/SRPMS/majordomo-1.94.5-2.src.rpm
8c829a13c2229060c899ffdc7e7db38c 6.1/alpha/majordomo-1.94.5-2.alpha.rpm
f0e22f364abcbe4c217f2b8eb180037d 6.1/i386/majordomo-1.94.5-2.i386.rpm
89e327c6c92acc97db34e541f34c0c67 6.1/sparc/majordomo-1.94.5-2.sparc.rpm
These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/corp/contact.html

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:

Thanks to Brock Tellier at btellier@USA.NET for noting the vulnerability in resend, to Shevek at shevek@anarres.org and Olaf Kirch at okir@monad.swb.de for noting the vulnerability in the wrapper.