[RHSA-2004:440-01] An updated lha package fixes security vulnerability

Tue Sep 7 15:44:00 UTC 2004

An updated lha package that fixes a buffer overflow 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:

LHA is an archiving and compression utility for LHarc format archives.

Lukasz Wojtow discovered a stack-based buffer overflow in all versions
of lha up to and including version 1.14.  A carefully created archive could
allow an attacker to execute arbitrary code when a victim extracts or tests
the archive.  The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2004-0769 to this issue.

Buffer overflows were discovered in the command line processing of all
versions of lha up to and including version 1.14.  If a malicious user can
trick a victim into passing a specially crafted command line to the lha
command, it is possible that arbitrary code could be executed.  The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the
names CAN-2004-0771 and CAN-2004-0694 to these issues.

Thomas Biege discovered a shell meta character command execution
vulnerability in all versions of lha up to and including 1.14.  An attacker
could create a directory with shell meta characters in its name which could
lead to arbitrary command execution.  The Common Vulnerabilities and
Exposures project (cve.mitre.org) has assigned the name CAN-2004-0745 to
this issue.

Users of lha should update 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/ for more info):

126740 - Buffer overflow in lha

6. RPMs required:

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

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/lha-1.00-17.3.src.rpm
b1b6d9d7d549331766f710ba6c5bf494  lha-1.00-17.3.src.rpm

i386:
3247304974c5a1ee592a1095a3a8c265  lha-1.00-17.3.i386.rpm

ia64:
1d13c396eab707b0603464455b4065e0  lha-1.00-17.3.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/lha-1.00-17.3.src.rpm
b1b6d9d7d549331766f710ba6c5bf494  lha-1.00-17.3.src.rpm

ia64:
1d13c396eab707b0603464455b4065e0  lha-1.00-17.3.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/lha-1.00-17.3.src.rpm
b1b6d9d7d549331766f710ba6c5bf494  lha-1.00-17.3.src.rpm

i386:
3247304974c5a1ee592a1095a3a8c265  lha-1.00-17.3.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/lha-1.00-17.3.src.rpm
b1b6d9d7d549331766f710ba6c5bf494  lha-1.00-17.3.src.rpm

i386:
3247304974c5a1ee592a1095a3a8c265  lha-1.00-17.3.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.html#package

7. References:

http://marc.theaimsgroup.com/?l=bugtraq&m=108668791510153
http://lw.ftw.zamosc.pl/lha-exploit.txt
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0771
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0769
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0694
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0745

8. Contact:

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

Copyright 2004 Red Hat, Inc.
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