Low: xinetd security and bug fix update
Security Advisory: Low
An updated xinetd package that fixes one security issue and two bugs is now
available for Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having low
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.
The xinetd package provides a secure replacement for inetd, the Internet
services daemon. xinetd provides access control for all services based on
the address of the remote host and/or on time of access, and can prevent
denial-of-access attacks.
When xinetd services are configured with the "TCPMUX" or "TCPMUXPLUS" type,
and the tcpmux-server service is enabled, those services are accessible via
port 1. It was found that enabling the tcpmux-server service (it is
disabled by default) allowed every xinetd service, including those that are
not configured with the "TCPMUX" or "TCPMUXPLUS" type, to be accessible via
port 1. This could allow a remote attacker to bypass intended firewall
restrictions. (CVE-2012-0862)
Red Hat would like to thank Thomas Swan of FedEx for reporting this issue.
This update also fixes the following bugs:
All users of xinetd are advised to upgrade to this updated package, which
contains backported patches to correct these issues.
Before applying this update, make sure all previously-released errata
relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258