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AUSCERT External Security Bulletin Redistribution
ESB-2002.264 -- RHSA-2002:097-08
Updated xchat packages fix /dns vulnerability
6 June 2002
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AusCERT Security Bulletin Summary
---------------------------------
Product: xchat
Vendor: Red Hat
Operating System: Red Hat Linux 6.2
Red Hat Linux 7.0
Red Hat Linux 7.1
Red Hat Linux 7.2
Red Hat Linux 7.3
Platform: alpha
i386
sparc
ia64
Impact: Execute Arbitrary Code/Commands
Access Required: Remote
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Red Hat, Inc. Red Hat Security Advisory
Synopsis: Updated xchat packages fix /dns vulnerability
Advisory ID: RHSA-2002:097-08
Issue date: 2002-05-20
Updated on: 2002-06-04
Product: Red Hat Linux
Keywords: xchat dns vulnerability
Cross references:
Obsoletes: RHSA-2002:005
CVE Names: CAN-2002-0382
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1. Topic:
A security issue in XChat allows a malicious server to execute arbitrary
commands.
2. Relevant releases/architectures:
Red Hat Linux 6.2 - alpha, i386, sparc
Red Hat Linux 7.0 - alpha, i386
Red Hat Linux 7.1 - alpha, i386, ia64
Red Hat Linux 7.2 - i386, ia64
Red Hat Linux 7.3 - i386
3. Problem description:
XChat is a popular cross-platform IRC client.
Versions of XChat prior to 1.8.9 do not filter the response from an IRC
server when a /dns query is executed. Because XChat resolves hostnames by
passing the configured resolver and hostname to a shell, an IRC server may
return a maliciously formatted response that executes arbitrary commands
with the privileges of the user running XChat.
All users of XChat are advised to update to these errata packages
containing XChat version 1.8.9 which is not vulnerable to this issue.
4. Solution:
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
To update all RPMs for your particular architecture, run:
rpm -Fvh [filenames]
where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.
Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:
up2date
This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.
5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):
6. RPMs required:
Red Hat Linux 6.2:
SRPMS:
ftp://updates.redhat.com/6.2/en/os/SRPMS/xchat-1.8.9-1.62.0.src.rpm
alpha:
ftp://updates.redhat.com/6.2/en/os/alpha/xchat-1.8.9-1.62.0.alpha.rpm
i386:
ftp://updates.redhat.com/6.2/en/os/i386/xchat-1.8.9-1.62.0.i386.rpm
sparc:
ftp://updates.redhat.com/6.2/en/os/sparc/xchat-1.8.9-1.62.0.sparc.rpm
Red Hat Linux 7.0:
SRPMS:
ftp://updates.redhat.com/7.0/en/os/SRPMS/xchat-1.8.9-1.70.0.src.rpm
alpha:
ftp://updates.redhat.com/7.0/en/os/alpha/xchat-1.8.9-1.70.0.alpha.rpm
i386:
ftp://updates.redhat.com/7.0/en/os/i386/xchat-1.8.9-1.70.0.i386.rpm
Red Hat Linux 7.1:
SRPMS:
ftp://updates.redhat.com/7.1/en/os/SRPMS/xchat-1.8.9-1.71.0.src.rpm
alpha:
ftp://updates.redhat.com/7.1/en/os/alpha/xchat-1.8.9-1.71.0.alpha.rpm
i386:
ftp://updates.redhat.com/7.1/en/os/i386/xchat-1.8.9-1.71.0.i386.rpm
ia64:
ftp://updates.redhat.com/7.1/en/os/ia64/xchat-1.8.9-1.71.0.ia64.rpm
Red Hat Linux 7.2:
SRPMS:
ftp://updates.redhat.com/7.2/en/os/SRPMS/xchat-1.8.9-1.72.0.src.rpm
i386:
ftp://updates.redhat.com/7.2/en/os/i386/xchat-1.8.9-1.72.0.i386.rpm
ia64:
ftp://updates.redhat.com/7.2/en/os/ia64/xchat-1.8.9-1.72.0.ia64.rpm
Red Hat Linux 7.3:
SRPMS:
ftp://updates.redhat.com/7.3/en/os/SRPMS/xchat-1.8.9-1.73.0.src.rpm
i386:
ftp://updates.redhat.com/7.3/en/os/i386/xchat-1.8.9-1.73.0.i386.rpm
7. Verification:
MD5 sum Package Name
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e9205c8b8d04eb867fb906fa3c4f3277 6.2/en/os/SRPMS/xchat-1.8.9-1.62.0.src.rpm
ed3402d01df1aff10adc5b3e8970667a 6.2/en/os/alpha/xchat-1.8.9-1.62.0.alpha.rpm
5b53b0f3a1bf0617df357e2512d5581d 6.2/en/os/i386/xchat-1.8.9-1.62.0.i386.rpm
d23b18f8f4df101cd2a18ad90b6400e3 6.2/en/os/sparc/xchat-1.8.9-1.62.0.sparc.rpm
4412093762c3c7bc83e0a76ac68aedff 7.0/en/os/SRPMS/xchat-1.8.9-1.70.0.src.rpm
e075d164b1bf297ad39424fef5698e2c 7.0/en/os/alpha/xchat-1.8.9-1.70.0.alpha.rpm
f6fc19d3f5d43ce0742e66334c6c229b 7.0/en/os/i386/xchat-1.8.9-1.70.0.i386.rpm
f461006a5e96a2cc606dc9d22844a194 7.1/en/os/SRPMS/xchat-1.8.9-1.71.0.src.rpm
535d9187ec52088cff5de38e3378cc5d 7.1/en/os/alpha/xchat-1.8.9-1.71.0.alpha.rpm
fa751c42b68ab8170684b479e249aced 7.1/en/os/i386/xchat-1.8.9-1.71.0.i386.rpm
db5b74b28cdedab821f590efca118f2c 7.1/en/os/ia64/xchat-1.8.9-1.71.0.ia64.rpm
9b9ba555093def10cdcf055c899b03af 7.2/en/os/SRPMS/xchat-1.8.9-1.72.0.src.rpm
6fabcf32b982ffb978f91b21c0f52fb8 7.2/en/os/i386/xchat-1.8.9-1.72.0.i386.rpm
eb3b95d31de4e478cd0525a2a8eeb1d6 7.2/en/os/ia64/xchat-1.8.9-1.72.0.ia64.rpm
2c166f6bd30336a83ad99041c9d3510c 7.3/en/os/SRPMS/xchat-1.8.9-1.73.0.src.rpm
bc85e6662044a386ce35b472635444fa 7.3/en/os/i386/xchat-1.8.9-1.73.0.i386.rpm
These packages are GPG signed by Red Hat, Inc. for security. Our key
is available at:
http://www.redhat.com/about/contact/pgpkey.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:
http://online.securityfocus.com/bid/4376/info/
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0382
Copyright(c) 2000, 2001, 2002 Red Hat, Inc.
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