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    <p>According to the <a href="http://packages.debian.org/changelogs/pool/main/a/apache2/apache2_2.2.9-10+lenny8/changelog" rel="noreferrer">Debian changelog</a>, you're using the apache2 package version 2.2.9-10+lenny8 (the latest one available for Lenny), built Apr 20 2010. Version 2.2.9-10+lenny6 had introduced a quick fix for the problem (CVE-2009-3555):</p> <blockquote> <p>Reject any client-initiated SSL/TLS renegotiations. This is a partial fix for the TLS renegotiation prefix injection attack (CVE-2009-3555). Any configuration which requires renegotiation for per-directory/location access control or uses "SSLVerifyClient optional" is still vulnerable.</p> </blockquote> <p>Therefore, you should disable <code>SSLVerifyClient optional</code> in <code>Directory</code> or <code>Location</code> directives.</p> <p>The TLS renegotiation extension (RFC 5746), which addresses the problem in <code>SSLVerifyClient optional</code> more generally, was implemented in OpenSSL versions 0.9.8m and 1.0.0a, which you would need if you wanted to use it.</p> <p>If you're not using <code>SSLVerifyClient optional</code> in location/directory directives, your configuration doesn't seem insecure, it just doesn't support this TLS extension that would have allowed you to keep using client-certificate authentication on a per-directory/location basis.</p> <p><a href="http://www.apache.org/dist/httpd/CHANGES_2.2" rel="noreferrer">Apache Httpd 2.2.15</a> also introduced the <a href="http://httpd.apache.org/docs/2.2/mod/mod_ssl.html#sslinsecurerenegotiation" rel="noreferrer"><code>SSLInsecureRenegotiation</code></a> directive if you want to force the insecure behaviour (and use OpenSSL 0.9.8m or above).</p>
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