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<td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"><a href="https://shibboleth.atlassian.net/browse/IDP?atlOrigin=eyJpIjoiOWMyZjZiZTQ3MzEzNDk1MTgwMjJkOTUxODA1OWZmZWMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Identity Provider</a> / <a href="https://shibboleth.atlassian.net/browse/IDP-2084?atlOrigin=eyJpIjoiOWMyZjZiZTQ3MzEzNDk1MTgwMjJkOTUxODA1OWZmZWMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-1aaf06e2-24d1-48bf-89ce-e0722056783c" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://shibboleth.atlassian.net/browse/IDP-2084?atlOrigin=eyJpIjoiOWMyZjZiZTQ3MzEzNDk1MTgwMjJkOTUxODA1OWZmZWMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">IDP-2084</a></td>
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<td style="vertical-align: top;; padding: 0; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"><span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://shibboleth.atlassian.net/browse/IDP-2084?atlOrigin=eyJpIjoiOWMyZjZiZTQ3MzEzNDk1MTgwMjJkOTUxODA1OWZmZWMiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">RemoteUser authn servlet uses hardcoded checkHeaders (4.3.0b</a> </span></td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"><img src="cid:jira-generated-image-avatar-1aaf06e2-24d1-48bf-89ce-e0722056783c" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug</td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top">4.3.0</td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top">30/Mar/23 8:09 AM</td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"><img src="cid:jira-generated-image-static-trivial-8a9ac724-fed8-4120-a637-66c144e2342d" height="16" width="16" border="0" align="absmiddle" alt="Trivial" style="vertical-align: text-bottom"> Trivial</td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"><a class="user-hover" rel="5c642d8a911797593beaebd4" style="color:#3b73af;; color: #3b73af; text-decoration: none" id="email_5c642d8a911797593beaebd4" href="https://shibboleth.atlassian.net/secure/ViewProfile.jspa?accountId=5c642d8a911797593beaebd4"> Tero Marttila </a></td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"><p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">The Shbiboleth IDP 4.3.0 release ships git commit 6d3b4b94185f98d1ecf58cb412af11836d445948 with the following diff to <tt>idp-authn-impl/src/main/java/net/shibboleth/idp/authn/impl/RemoteUserAuthServlet.java</tt>:</p>
<div class="preformatted panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
<div class="preformattedContent panelContent" style="padding: 9px 12px">
<pre style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal; white-space: pre; word-break: normal; word-wrap: break-word; word-break: break-all; white-space: pre-wrap">--- a/idp-authn-impl/src/main/java/net/shibboleth/idp/authn/impl/RemoteUserAuthServlet.java
+++ b/idp-authn-impl/src/main/java/net/shibboleth/idp/authn/impl/RemoteUserAuthServlet.java
@@ -188,7 +188,8 @@ public class RemoteUserAuthServlet extends HttpServlet {
}
}
- param = config.getInitParameter(CHECK_HEADERS_PARAM);
+ //param = config.getInitParameter(CHECK_HEADERS_PARAM);
+ param = "ShibbolethUser";
if (param != null) {
final String[] headers = param.split(" ");
if (headers != null) {
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">This means that the <a href="https://shibboleth.atlassian.net/wiki/spaces/IDP4/pages/1265631618/RemoteUserAuthnConfiguration" class="external-link" rel="nofollow noreferrer" style="color: #3b73af; text-decoration: none">RemoteUser</a> authn configuration no longer respects the servlet init-params configured in <tt>web.xml</tt>, e.g.:</p>
<div class="preformatted panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
<div class="preformattedContent panelContent" style="padding: 9px 12px">
<pre style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal; white-space: pre; word-break: normal; word-wrap: break-word; word-break: break-all; white-space: pre-wrap"> <!-- Servlet protected by container used for RemoteUser authentication -->
<servlet>
<servlet-name>RemoteUserAuthHandler</servlet-name>
<servlet-class>net.shibboleth.idp.authn.impl.RemoteUserAuthServlet</servlet-class>
<load-on-startup>2</load-on-startup>
<init-param>
<param-name>checkHeaders</param-name>
<param-value>X-Forwarded-User</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>RemoteUserAuthHandler</servlet-name>
<url-pattern>/Authn/RemoteUser</url-pattern>
</servlet-mapping></pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">This can be observed in the INFO logs at boot:</p>
<div class="preformatted panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
<div class="preformattedContent panelContent" style="padding: 9px 12px">
<pre style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal; white-space: pre; word-break: normal; word-wrap: break-word; word-break: break-all; white-space: pre-wrap">2023-03-30 11:00:00,713 - - INFO [net.shibboleth.idp.authn.impl.RemoteUserAuthServlet:215] - RemoteUserAuthServlet will process REMOTE_USER, along with attributes [] and headers [ShibbolethUser]</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">This is a regression in 4.2.0 → 4.3.0 that breaks RemoteUser authentication flows using HTTP request header based authentication.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">This may have security implications, because the default RemoteUser authn configuration now consumes trusted authentication information from a previously unused HTTP request header, which is probably not filtered out and may contain untrusted data supplied by an attacker.</p></td>
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