FLSA-2004:1296: Updated pwlib resolves security vulnerability
Posted on: 05/19/2004 02:59 AM

Updated pwlib packages are available for Red Hat Linux 7.3 and 8.0

Fedora Legacy Update Advisory

Synopsis: Updated pwlib resolves security vulnerability
Advisory ID: FLSA:1296
Issue date: 2004-05-18
Product: Red Hat Linux
Keywords: Security
Cross references: https://bugzilla.fedora.us/show_bug.cgi?id=1296
CVE Names: CAN-2004-0097

1. Topic:

Updated PWLib packages that contain fixes for security issues found during protocol testing by the NISCC are now available.

2. Relevent releases/architectures:

Red Hat Linux 7.3 - i386
Red Hat Linux 8.0 - i386

3. Problem description:

PWLib is a cross-platform class library designed to support the OpenH323 project. OpenH323 provides an implementation of the ITU H.323 teleconferencing protocol, used by packages such as Gnome Meeting.

A test suite for the H.225 protocol (part of the H.323 family) provided by the NISCC uncovered bugs in PWLib prior to version 1.6.0. An attacker could trigger these bugs by sending carefully crafted messages to an application. The effects of such an attack can vary depending on the application, but would usually result in a Denial of Service. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0097 to this issue.

Users are advised to upgrade to the erratum packages, which contain backported security fixes and are not vulnerable to these issues.

Fedora Legacy would like to thank Johnny Strom for notification of 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 yum and apt. Many people find this an easier way to apply updates. To use yum issue:

yum update

or to use apt:

apt-get update; apt-get upgrade

This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. This assumes that you have yum or apt-get configured for obtaining Fedora Legacy content. Please visit http://www.fedoralegacy.org/docs for directions on how to configure yum and apt-get.

5. Bug IDs fixed:

http://bugzilla.fedora.us - 1296 - PWLib: Carefully crafted messages can cause a Denial of Service on a application.

6. RPMs required:

Red Hat Linux 7.3:



Red Hat Linux 8.0:



7. Verification:

SHA1 sum Package Name
- ---------------------------------------------------------------------------



These packages are GPG signed by Fedora Legacy for security. Our key is available from http://www.fedoralegacy.org/about/security.php

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 sha1sum with the following command:

sha1sum <filename>

8. References:

9. Contact:

The Fedora Legacy security contact is secnotice@fedoralegacy.org. More
project details at http://www.fedoralegacy.org

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