[16366] in bugtraq
[RHSA-2000:055-03] XChat can pass URLs from IRC to a shell
daemon@ATHENA.MIT.EDU (bugzilla@REDHAT.COM)
Wed Aug 23 15:13:52 2000
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Date: Wed, 23 Aug 2000 12:38:00 -0400
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Red Hat, Inc. Security Advisory
Synopsis: XChat can pass URLs from IRC to a shell
Advisory ID: RHSA-2000:055-03
Issue date: 2000-08-22
Updated on: 2000-08-23
Product: Red Hat Linux
Keywords: XChat IRC shell
Cross references: N/A
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1. Topic:
A new XChat package is available that fixes a possible
security hole.
2. Relevant releases/architectures:
Red Hat Linux 6.2 - i386, alpha, sparc
3. Problem description:
XChat allows users to right-click on a URL appearing
in an IRC discussion and select "Open in Browser." To
open the URL in a browser, XChat passes it to /bin/sh.
So, a malicious URL could execute arbitrary shell commands
as the user running XChat. This errata changes XChat to
bypass the shell and execute the browser directly.
4. Solution:
For each RPM for your particular architecture, run:
rpm -Fvh [filename]
where filename is the name of the RPM.
5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):
N/A
6. RPMs required:
Red Hat Linux 6.2:
sparc:
ftp://updates.redhat.com/6.2/sparc/xchat-1.4.0-2.sparc.rpm
alpha:
ftp://updates.redhat.com/6.2/alpha/xchat-1.4.0-2.alpha.rpm
i386:
ftp://updates.redhat.com/6.2/i386/xchat-1.4.0-2.i386.rpm
sources:
ftp://updates.redhat.com/6.2/SRPMS/xchat-1.4.0-2.src.rpm
7. Verification:
MD5 sum Package Name
--------------------------------------------------------------------------
0642e627980c723b64a865662b27c638 6.2/SRPMS/xchat-1.4.0-2.src.rpm
79491287b1b683bd882f5ddcf0429018 6.2/alpha/xchat-1.4.0-2.alpha.rpm
285f31993a4084659c38b13d3f8f9c41 6.2/i386/xchat-1.4.0-2.i386.rpm
5878e8cd14c2aacb59ea3d05e379ca67 6.2/sparc/xchat-1.4.0-2.sparc.rpm
These packages are GPG signed by Red Hat, Inc. for security. Our key
is available at:
http://www.redhat.com/corp/contact.html
You can verify each package with the following command:
rpm --checksig <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:
rpm --checksig --nogpg <filename>
8. References:
Reported to BUGTRAQ by Zenith Parsec.
Copyright(c) 2000 Red Hat, Inc.
