RHSA-2005:007-01: Updated unarj package fixes security issue
Posted on: 01/12/2005 06:14 PM

Updated unarj packages are available for Red Hat Enterprise Linux 2.1

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Red Hat Security Advisory

Synopsis: Updated unarj package fixes security issue
Advisory ID: RHSA-2005:007-01
Advisory URL: https://rhn.redhat.com/errata/RHSA-2005-007.html
Issue date: 2005-01-12
Updated on: 2005-01-12
Product: Red Hat Enterprise Linux
CVE Names: CAN-2004-0947 CAN-2004-1027
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1. Summary:

An updated unarj package that fixes a buffer overflow vulnerability and a directory traversal vulnerability is now available.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386
Red Hat Enterprise Linux WS version 2.1 - i386

3. Problem description:

The unarj program is an archiving utility which can extract ARJ-compatible archives.

A buffer overflow bug was discovered in unarj when handling long file names contained in an archive. An attacker could create a specially crafted archive which could cause unarj to crash or possibly execute arbitrary code when extracted by a victim. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0947 to this issue.

Additionally, a path traversal vulnerability was discovered in unarj. An attacker could create a specially crafted archive which would create files in the parent ("..") directory when extracted by a victim. When used recursively, this vulnerability could be used to overwrite critical system files and programs. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-1027 to this issue.

Users of unarj should upgrade to this updated package which contains backported patches and is not vulnerable to these issues.

4. 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/

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

138462 - CAN-2004-0947 buffer overflow in unarj
138835 - CAN-2004-1027 unarj directory traversal issue

6. RPMs required:

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

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/unarj-2.43-13.src.rpm
abb1c235036bd233c437b003a4dbb8c1 unarj-2.43-13.src.rpm

i386:
1b3f6e7e8780f02a7b6038b78f3af8c2 unarj-2.43-13.i386.rpm

ia64:
346187352a1792700194a7c7bd5de83f unarj-2.43-13.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/unarj-2.43-13.src.rpm
abb1c235036bd233c437b003a4dbb8c1 unarj-2.43-13.src.rpm

ia64:
346187352a1792700194a7c7bd5de83f unarj-2.43-13.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/unarj-2.43-13.src.rpm
abb1c235036bd233c437b003a4dbb8c1 unarj-2.43-13.src.rpm

i386:
1b3f6e7e8780f02a7b6038b78f3af8c2 unarj-2.43-13.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/unarj-2.43-13.src.rpm
abb1c235036bd233c437b003a4dbb8c1 unarj-2.43-13.src.rpm

i386:
1b3f6e7e8780f02a7b6038b78f3af8c2 unarj-2.43-13.i386.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

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0947
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1027

8. Contact:

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

Copyright 2005 Red Hat, Inc.


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