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AUSCERT External Security Bulletin Redistribution
ESB-2005.0030 -- RHSA-2005:007-01
Updated unarj package fixes security issue
13 January 2005
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AusCERT Security Bulletin Summary
---------------------------------
Product: unarj
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux AS/ES/WS 2.1
Red Hat Linux Advanced Workstation 2.1
Linux variants
UNIX variants
Impact: Execute Arbitrary Code/Commands
Overwrite Arbitrary Files
Access: Remote/Unauthenticated
CVE Names: CAN-2004-1027 CAN-2004-0947
Ref: ESB-2004.0735
Original Bulletin: https://rhn.redhat.com/errata/RHSA-2005-007.html
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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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