(Red Hat Issues Fix) Re: 'nfs-utils' Buffer Overflow May Let Remote Users Execute Arbitrary Code


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                   Red Hat Security Advisory

Synopsis:          Updated nfs-utils packages fix denial of service vulnerability
Advisory ID:       RHSA-2003:206-01
Issue date:        2003-07-14
Updated on:        2003-07-14
Product:           Red Hat Linux
Keywords:          mountd DoS
Cross references:  
Obsoletes:         
CVE Names:         CAN-2003-0252
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1. Topic:

Updated nfs-utils packages are available that fix a remotely exploitable
Denial of Service vulnerability.

2. Relevant releases/architectures:

Red Hat Linux 7.1 - i386
Red Hat Linux 7.2 - i386, ia64
Red Hat Linux 7.3 - i386
Red Hat Linux 8.0 - i386
Red Hat Linux 9 - i386

3. Problem description:

The nfs-utils package provides a daemon for the kernel NFS server and
related tools.

Janusz Niewiadomski found a buffer overflow bug in nfs-utils version 1.0.3
and earlier.  This bug could be exploited by an attacker, causing a remote
Denial of Service (crash).  It is not believed that this bug could lead to
remote arbitrary code execution.

Users are advised to update to these erratum packages, which contain a
backported security patch supplied by the nfs-utils maintainers and are not
vulnerable to this issue.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] 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 directory *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:

up2date

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

5. RPMs required:

Red Hat Linux 7.1:

SRPMS:
ftp://updates.redhat.com/7.1/en/os/SRPMS/nfs-utils-0.3.1-6.71.src.rpm

i386:
ftp://updates.redhat.com/7.1/en/os/i386/nfs-utils-0.3.1-6.71.i386.rpm

Red Hat Linux 7.2:

SRPMS:
ftp://updates.redhat.com/7.2/en/os/SRPMS/nfs-utils-0.3.1-14.72.src.rpm

i386:
ftp://updates.redhat.com/7.2/en/os/i386/nfs-utils-0.3.1-14.72.i386.rpm

ia64:
ftp://updates.redhat.com/7.2/en/os/ia64/nfs-utils-0.3.1-14.72.ia64.rpm

Red Hat Linux 7.3:

SRPMS:
ftp://updates.redhat.com/7.3/en/os/SRPMS/nfs-utils-0.3.3-6.73.src.rpm

i386:
ftp://updates.redhat.com/7.3/en/os/i386/nfs-utils-0.3.3-6.73.i386.rpm

Red Hat Linux 8.0:

SRPMS:
ftp://updates.redhat.com/8.0/en/os/SRPMS/nfs-utils-1.0.1-2.80.src.rpm

i386:
ftp://updates.redhat.com/8.0/en/os/i386/nfs-utils-1.0.1-2.80.i386.rpm

Red Hat Linux 9:

SRPMS:
ftp://updates.redhat.com/9/en/os/SRPMS/nfs-utils-1.0.1-3.9.src.rpm

i386:
ftp://updates.redhat.com/9/en/os/i386/nfs-utils-1.0.1-3.9.i386.rpm



6. Verification:

MD5 sum                          Package Name
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310db07d759fe4e4462ac555d70f47b2 7.1/en/os/SRPMS/nfs-utils-0.3.1-6.71.src.rpm
ab8ca9b6daf3f65a720e47a8f7bd7b1d 7.1/en/os/i386/nfs-utils-0.3.1-6.71.i386.rpm
0a1a9674ae946f9968790343ad014285 7.2/en/os/SRPMS/nfs-utils-0.3.1-14.72.src.rpm
332ca9cabfee2fd3f119bf4b0526685c 7.2/en/os/i386/nfs-utils-0.3.1-14.72.i386.rpm
d672f188bb53273e9148acaecb3bdd37 7.2/en/os/ia64/nfs-utils-0.3.1-14.72.ia64.rpm
6d5107a412655f7b4b65434c906673f7 7.3/en/os/SRPMS/nfs-utils-0.3.3-6.73.src.rpm
3462808562e694d4e0c86df5340f8337 7.3/en/os/i386/nfs-utils-0.3.3-6.73.i386.rpm
8daa79231059651541204f0944f21959 8.0/en/os/SRPMS/nfs-utils-1.0.1-2.80.src.rpm
cce23fd6a17e8304b0c9bfad097ae45f 8.0/en/os/i386/nfs-utils-1.0.1-2.80.i386.rpm
0dcc44660e89ff09dd22b680b9ec28ca 9/en/os/SRPMS/nfs-utils-1.0.1-3.9.src.rpm
cf5c65a715751de995fe33546e4b57a6 9/en/os/i386/nfs-utils-1.0.1-3.9.i386.rpm


These packages are GPG signed by Red Hat for security.  Our key is
available from http://www.redhat.com/security/keys.html

You can verify each package with the following command:
    
    rpm --checksig -v <filename>

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
    
    md5sum <filename>


7. References:

http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/nfs/nfs-utils/ChangeLog?rev=1.207&content-type=text/vnd.viewcvs-markup
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0252

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at http://www.redhat.com/solutions/security/news/contact.html

Copyright 2003 Red Hat, Inc.
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