- ---------------------------------------------------------------------                   Red Hat Security Advisory

Synopsis:          Low: sharutils security update
Advisory ID:       RHSA-2005:377-01
Advisory URL:      https://access.redhat.com/errata/RHSA-2005:377.html
Issue date:        2005-04-26
Updated on:        2005-04-26
Product:           Red Hat Enterprise Linux
CVE Names:         CAN-2004-1772 CAN-2004-1773 CAN-2005-0990
- ---------------------------------------------------------------------1. Summary:

An updated sharutils package is now available.

This update has been rated as having low security impact by the Red Hat
Security Response Team.

2. Problem description:

The sharutils package contains a set of tools for encoding and decoding
packages of files in binary or text format.

A stack based overflow bug was found in the way shar handles the -o option.
If a user can be tricked into running a specially crafted command, it could
lead to arbitrary code execution.  The Common Vulnerabilities and Exposures
project (cve.mitre.org) has assigned the name CAN-2004-1772 to this issue.
Please note that this issue does not affect Red Hat Enterprise Linux 4.

Two buffer overflow bugs were found in sharutils. If an attacker can place
a malicious 'wc' command on a victim's machine, or trick a victim into
running a specially crafted command, it could lead to arbitrary code
execution.  The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2004-1773 to this issue.

A bug was found in the way unshar creates temporary files. A local user
could use symlinks to overwrite arbitrary files the victim running unshar
has write access to. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2005-0990 to this issue.

All users of sharutils should upgrade to this updated package, which
includes backported fixes to correct these issues.

3. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.  Use Red Hat
Network to download and update your packages.  To launch the Red Hat
Update Agent, use the following command:

    up2date

For information on how to install packages manually, refer to the
following Web page for the System Administration or Customization
guide specific to your system:

    http://www.redhat.com/docs/manuals/enterprise/

4. Bug IDs fixed (http://bugzilla.redhat.com/):

152571 - CAN-2004-1772 buffer overflow with -o option
152573 - CAN-2004-1773 Buffer overflows in unshar
154049 - CAN-2005-0990 insecure temp file usage

5. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS:
4ff9ccec228d473e8983f60cec4f7bba  sharutils-4.2.1-8.9.x.src.rpm

i386:
a11c9f7ce6ec7e339554f88dd586ca53  sharutils-4.2.1-8.9.x.i386.rpm

ia64:
c80d5a08b52b452b2c11cb7b0dffc59b  sharutils-4.2.1-8.9.x.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
4ff9ccec228d473e8983f60cec4f7bba  sharutils-4.2.1-8.9.x.src.rpm

ia64:
c80d5a08b52b452b2c11cb7b0dffc59b  sharutils-4.2.1-8.9.x.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
4ff9ccec228d473e8983f60cec4f7bba  sharutils-4.2.1-8.9.x.src.rpm

i386:
a11c9f7ce6ec7e339554f88dd586ca53  sharutils-4.2.1-8.9.x.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
4ff9ccec228d473e8983f60cec4f7bba  sharutils-4.2.1-8.9.x.src.rpm

i386:
a11c9f7ce6ec7e339554f88dd586ca53  sharutils-4.2.1-8.9.x.i386.rpm

Red Hat Enterprise Linux AS version 3:

SRPMS:
06a6b26786f3674b33280441417316c8  sharutils-4.2.1-16.2.src.rpm

i386:
3228571c5d375ff8ae96e6f7bf00a046  sharutils-4.2.1-16.2.i386.rpm

ia64:
caa4872797cbb61cbb3d86c9bc6b9c17  sharutils-4.2.1-16.2.ia64.rpm

ppc:
cf2564b18459cea9958c373396894ecc  sharutils-4.2.1-16.2.ppc.rpm

s390:
ee6bb67d0ea5d5d79539437f78f1128f  sharutils-4.2.1-16.2.s390.rpm

s390x:
89114c0f739d46695fa787f3227a960c  sharutils-4.2.1-16.2.s390x.rpm

x86_64:
337510c9c7925ed4e916b2733059d35d  sharutils-4.2.1-16.2.x86_64.rpm

Red Hat Desktop version 3:

SRPMS:
06a6b26786f3674b33280441417316c8  sharutils-4.2.1-16.2.src.rpm

i386:
3228571c5d375ff8ae96e6f7bf00a046  sharutils-4.2.1-16.2.i386.rpm

x86_64:
337510c9c7925ed4e916b2733059d35d  sharutils-4.2.1-16.2.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

SRPMS:
06a6b26786f3674b33280441417316c8  sharutils-4.2.1-16.2.src.rpm

i386:
3228571c5d375ff8ae96e6f7bf00a046  sharutils-4.2.1-16.2.i386.rpm

ia64:
caa4872797cbb61cbb3d86c9bc6b9c17  sharutils-4.2.1-16.2.ia64.rpm

x86_64:
337510c9c7925ed4e916b2733059d35d  sharutils-4.2.1-16.2.x86_64.rpm

Red Hat Enterprise Linux WS version 3:

SRPMS:
06a6b26786f3674b33280441417316c8  sharutils-4.2.1-16.2.src.rpm

i386:
3228571c5d375ff8ae96e6f7bf00a046  sharutils-4.2.1-16.2.i386.rpm

ia64:
caa4872797cbb61cbb3d86c9bc6b9c17  sharutils-4.2.1-16.2.ia64.rpm

x86_64:
337510c9c7925ed4e916b2733059d35d  sharutils-4.2.1-16.2.x86_64.rpm

Red Hat Enterprise Linux AS version 4:

SRPMS:
fb0f041f40c952667fa9e2415bb95481  sharutils-4.2.1-22.2.src.rpm

i386:
5528e7145b01b940474eed14da1a4bf5  sharutils-4.2.1-22.2.i386.rpm

ia64:
14609e1cd1f1d403ad562a27ff7090d0  sharutils-4.2.1-22.2.ia64.rpm

ppc:
83ae1ab7519ccd7905256da2319e006e  sharutils-4.2.1-22.2.ppc.rpm

s390:
f81531770bdd340cf5bd39ebed7c211b  sharutils-4.2.1-22.2.s390.rpm

s390x:
c68d22a3a01ad42d71b7d34b35a49896  sharutils-4.2.1-22.2.s390x.rpm

x86_64:
96fa0ac9f458ea3bed71aca056478e91  sharutils-4.2.1-22.2.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

SRPMS:
fb0f041f40c952667fa9e2415bb95481  sharutils-4.2.1-22.2.src.rpm

i386:
5528e7145b01b940474eed14da1a4bf5  sharutils-4.2.1-22.2.i386.rpm

x86_64:
96fa0ac9f458ea3bed71aca056478e91  sharutils-4.2.1-22.2.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

SRPMS:
fb0f041f40c952667fa9e2415bb95481  sharutils-4.2.1-22.2.src.rpm

i386:
5528e7145b01b940474eed14da1a4bf5  sharutils-4.2.1-22.2.i386.rpm

ia64:
14609e1cd1f1d403ad562a27ff7090d0  sharutils-4.2.1-22.2.ia64.rpm

x86_64:
96fa0ac9f458ea3bed71aca056478e91  sharutils-4.2.1-22.2.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

SRPMS:
fb0f041f40c952667fa9e2415bb95481  sharutils-4.2.1-22.2.src.rpm

i386:
5528e7145b01b940474eed14da1a4bf5  sharutils-4.2.1-22.2.i386.rpm

ia64:
14609e1cd1f1d403ad562a27ff7090d0  sharutils-4.2.1-22.2.ia64.rpm

x86_64:
96fa0ac9f458ea3bed71aca056478e91  sharutils-4.2.1-22.2.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

6. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1772
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1773
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0990

7. Contact:

The Red Hat security contact is .  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2005 Red Hat, Inc.