RHSA-2004:191-01: Updated cadaver package fixes security vulnerability in neon
Posted on: 05/19/2004 03:06 AM

Updated cadaver packages are available for Red Hat Enterprise Linux 2.1

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Red Hat Security Advisory

Synopsis: Updated cadaver package fixes security vulnerability in neon
Advisory ID: RHSA-2004:191-01
Issue date: 2004-05-19
Updated on: 2004-05-19
Product: Red Hat Enterprise Linux
Keywords: cadaver neon sscanf
Cross references:
Obsoletes:
CVE Names: CAN-2004-0398
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1. Topic:

An updated cadaver package is now available that fixes a vulnerability in neon which could be exploitable by a malicious DAV server.

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:

cadaver is a command-line WebDAV client that uses inbuilt code from neon, an HTTP and WebDAV client library.

Stefan Esser discovered a flaw in the neon library which allows a heap buffer overflow in a date parsing routine. An attacker could create a malicious WebDAV server in such a way as to allow arbitrary code execution on the client should a user connect to it using cadaver. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0398 to this issue.

Users of cadaver are advised to upgrade to this updated package, which contains a patch correcting this issue.

This issue does not affect Red Hat Enterprise Linux 3.

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.

If up2date fails to connect to Red Hat Network due to SSL Certificate Errors, you need to install a version of the up2date client with an updated certificate. The latest version of up2date is available from the Red Hat FTP site and may also be downloaded directly from the RHN website:

https://rhn.redhat.com/help/latest-up2date.pxt

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

122497 - CAN-2004-0398 heap overflow in neon affects cadaver

6. RPMs required:

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

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/cadaver-0.22.1-1.0.src.rpm

i386:
Available from Red Hat Network: cadaver-0.22.1-1.0.i386.rpm

ia64:
Available from Red Hat Network: cadaver-0.22.1-1.0.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/cadaver-0.22.1-1.0.src.rpm

ia64:
Available from Red Hat Network: cadaver-0.22.1-1.0.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/cadaver-0.22.1-1.0.src.rpm

i386:
Available from Red Hat Network: cadaver-0.22.1-1.0.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/cadaver-0.22.1-1.0.src.rpm

i386:
Available from Red Hat Network: cadaver-0.22.1-1.0.i386.rpm



7. Verification:

MD5 sum Package Name
- --------------------------------------------------------------------------
74352b500efc9fe95b932db561a97301 cadaver-0.22.1-1.0.i386.rpm
504c70514d6fe70edd342fe05809f059 cadaver-0.22.1-1.0.ia64.rpm
f61038fc22fd38899ee8366ed77c99a6 cadaver-0.22.1-1.0.src.rpm


These packages are GPG signed by Red Hat for security. Our key is available from https://www.redhat.com/security/team/key.html

You can verify each package with the following command:

rpm --checksig -v <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:

md5sum <filename>


8. References:

http://security.e-matters.de/advisories/062004.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0398

9. Contact:

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

Copyright 2004 Red Hat, Inc.


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