|| ||Pat Riehecky <email@example.com> |
|| ||Security ERRATA Low: xinetd on SL6.x i386/x86_64 |
|| ||Thu, 28 Feb 2013 16:16:42 -0600|
|| ||Article, Thread
Synopsis: Low: xinetd security and bug fix update
Issue Date: 2013-02-21
CVE Numbers: CVE-2012-0862
When xinetd services are configured with the "TCPMUX" or "TCPMUXPLUS"
the tcpmux-server service is enabled, those services are accessible via
It was found that enabling the tcpmux-server service (it is disabled by
default) allowed every xinetd service, including those that are not
with the "TCPMUX" or "TCPMUXPLUS" type, to be accessible via port 1.
allow a remote attacker to bypass intended firewall restrictions.
This update also fixes the following bugs:
* Prior to this update, a file descriptor array in the service.c source file
was not handled as expected. As a consequence, some of the descriptors
open when xinetd was under heavy load. Additionally, the system log was
with a large number of messages that took up a lot of disk space over time.
This update modifies the xinetd code to handle the file descriptors
and messages no longer fill the system log.
* Prior to this update, services were disabled permanently when their
was reached. As a consequence, a failed bind operation could occur when
attempted to restart the service. This update adds additional logic that
attempts to restart the service. Now, the service is only disabled if xinetd
cannot restart the service after 30 attempts.
- Scientific Linux Development Team
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