(RHSA-2008:0815) Moderate: yum-rhn-plugin security update

The yum-rhn-plugin provides support for yum to securely access a Red Hat
Network (RHN) server for software updates.

It was discovered that yum-rhn-plugin did not verify the SSL certificate
for all communication with a Red Hat Network server. An attacker able to
redirect the network communication between a victim and an RHN server could
use this flaw to provide malicious repository metadata. This metadata could
be used to block the victim from receiving specific security updates.
(CVE-2008-3270)

This flaw did not allow an attacker to install malicious packages. Package
signatures were verified and only packages signed with a trusted Red Hat
GPG key were installed.

Red Hat would like to thank Justin Cappos and Justin Samuel for discussing
various package update mechanism flaws which led to our discovery of this
issue.

Users of yum-rhn-plugin are advised to upgrade to this updated packages,
which resolves this issue.