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===========================================================================
              AUSCERT External Security Bulletin Redistribution
                                      
                                      
                    ESB-98.013 -- Red Hat Linux Bulletin
                            Vulnerabilities in MH
                               22 January 1998

===========================================================================

Red Hat Software, Inc. has released the following advisory concerning
buffer overflow vulnerabilities in the inc and msgchk programs which are
part of the MH package.  These vulnerabilities may allow users to gain
root access.

The following security bulletin is provided as a service to AUSCERT's
members.  As AUSCERT did not write this document, AUSCERT has had no
control over its content.  As such, the decision to use any or all of this
information is the responsibility of each user or organisation, and should
be done so in accordance with site policies and procedures.

NOTE: This is only the original release of the security bulletin.  It will
not be updated when the original bulletin is.  If downloading at a later
date, it is recommended that the bulletin is retrieved from the original
authors to ensure that the information is still current.

Contact information for Red Hat Software is available from:

	http://www.redhat.com/

If you have any questions or need further information, please contact them
directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/Information/advisories.html

If you believe that your system has been compromised, contact AUSCERT or your
representative in FIRST (Forum of Incident Response and Security Teams).

Internet Email: auscert@auscert.org.au
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AUSCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for emergencies.
Facsimile:      (07) 3365 7031


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Buffer overflows have been found in inc and msgchk as included with the
mh package in all versions of Red Hat. These overflows allow all users
to gain root access to systems with them installed.

If you do not need the mh package, the easiest fix for this problem is
to 'rpm -e mh'. If you do need it, fixes are available for users of Red
Hat 5.0 and Red Hat 4.x. As always, these packages have been signed with
the Red Hat PGP key.

Thanks to Cesar Tascon Alvarez for finding this problem.

Erik

Red Hat 5.0
- - -------------

i386:
rpm -Uvh ftp://ftp.redhat.com/updates/5.0/i386/mh-6.8.4-5.i386.rpm

alpha:
rpm -Uvh ftp://ftp.redhat.com/updates/5.0/alpha/mh-6.8.4-5.alpha.rpm

Red Hat 4.2
- - -------------

i386:
rpm -Uvh ftp://ftp.redhat.com/updates/4.2/i386/mh-6.8.3-14.i386.rpm

alpha:
rpm -Uvh ftp://ftp.redhat.com/updates/4.2/alpha/mh-6.8.3-14.alpha.rpm

SPARC:
rpm -Uvh ftp://ftp.redhat.com/updates/4.2/sparc/mh-6.8.3-14.sparc.rpm


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