httpd, mod_ssl security update

CentOS Errata and Security Advisory CESA-2006:0619

The Apache HTTP Server is a popular Web server available for free.

A bug was found in Apache where an invalid Expect header sent to the server
was returned to the user in an unescaped error message. This could
allow an attacker to perform a cross-site scripting attack if a victim was
tricked into connecting to a site and sending a carefully crafted Expect
header. (CVE-2006-3918)

While a web browser cannot be forced to send an arbitrary Expect
header by a third-party attacker, it was recently discovered that
certain versions of the Flash plugin can manipulate request headers.
If users running such versions can be persuaded to load a web page
with a malicious Flash applet, a cross-site scripting attack against
the server may be possible.

On Red Hat Enterprise Linux 3 and 4 systems, due to an unrelated issue in
the handling of malformed Expect headers, the page produced by the
cross-site scripting attack will only be returned after a timeout expires
(2-5 minutes by default) if not first canceled by the user.

Users of httpd should update to these erratum packages, which contain a
backported patch to correct these issues.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2006-August/075297.html
https://lists.centos.org/pipermail/centos-announce/2006-August/075298.html
https://lists.centos.org/pipermail/centos-announce/2006-August/075305.html
https://lists.centos.org/pipermail/centos-announce/2006-August/075306.html

Affected packages:
httpd
httpd-devel
httpd-manual
httpd-suexec
mod_ssl

Upstream details at:
https://access.redhat.com/errata/RHSA-2006:0619