Author: lukaszlenart
Date: Tue Jun 4 16:01:40 2013
New Revision: 864369
Log:
Updates draft docs
Added:
websites/production/struts/content/development/2.x/docs/s2-015.html
Modified:
websites/production/struts/content/development/2.x/docs/security-bulletins.html
Added: websites/production/struts/content/development/2.x/docs/s2-015.html
==============================================================================
--- websites/production/struts/content/development/2.x/docs/s2-015.html (added)
+++ websites/production/struts/content/development/2.x/docs/s2-015.html Tue Jun
4 16:01:40 2013
@@ -0,0 +1,246 @@
+
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
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+
+Unless required by applicable law or agreed to in writing,
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"http://www.w3.org/TR/html4/loose.dtd";>
+<HTML>
+ <HEAD>
+ <LINK type="text/css" rel="stylesheet"
href="https://struts.apache.org/css/default.css";>
+ <STYLE type="text/css">
+ .dp-highlighter {
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+ </STYLE>
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+ }
+ </STYLE>
+ <SCRIPT type="text/javascript" language="javascript">
+ var hide = null;
+ var show = null;
+ var children = null;
+
+ function init() {
+ /* Search form initialization */
+ var form = document.forms['search'];
+ if (form != null) {
+ form.elements['domains'].value = location.hostname;
+ form.elements['sitesearch'].value = location.hostname;
+ }
+
+ /* Children initialization */
+ hide = document.getElementById('hide');
+ show = document.getElementById('show');
+ children = document.all != null ?
+ document.all['children'] :
+ document.getElementById('children');
+ if (children != null) {
+ children.style.display = 'none';
+ show.style.display = 'inline';
+ hide.style.display = 'none';
+ }
+ }
+
+ function showChildren() {
+ children.style.display = 'block';
+ show.style.display = 'none';
+ hide.style.display = 'inline';
+ }
+
+ function hideChildren() {
+ children.style.display = 'none';
+ show.style.display = 'inline';
+ hide.style.display = 'none';
+ }
+ </SCRIPT>
+ <TITLE>S2-015</TITLE>
+ <META http-equiv="Content-Type" content="text/html;charset=UTF-8"></HEAD>
+ <BODY onload="init()">
+ <TABLE border="0" cellpadding="2" cellspacing="0" width="100%">
+ <TR class="topBar">
+ <TD align="left" valign="middle" class="topBarDiv" align="left"
nowrap="">
+ <A href="home.html" title="Apache Struts 2
Documentation">Apache Struts 2 Documentation</A> > <A
href="home.html" title="Home">Home</A> > <A
href="security-bulletins.html" title="Security Bulletins">Security
Bulletins</A> > <A href="" title="S2-015">S2-015</A>
+ </TD>
+ <TD align="right" valign="middle" nowrap="">
+ <FORM name="search" action="http://www.google.com/search";
method="get">
+ <INPUT type="hidden" name="ie" value="UTF-8">
+ <INPUT type="hidden" name="oe" value="UTF-8">
+ <INPUT type="hidden" name="domains" value="">
+ <INPUT type="hidden" name="sitesearch" value="">
+ <INPUT type="text" name="q" maxlength="255" value="">
+ <INPUT type="submit" name="btnG" value="Google Search">
+ </FORM>
+ </TD>
+ </TR>
+ </TABLE>
+
+ <DIV id="PageContent">
+ <DIV class="pageheader" style="padding: 6px 0px 0px 0px;">
+ <!-- We'll enable this once we figure out how to access (and save) the
logo resource -->
+ <!--img src="/wiki/images/confluence_logo.gif" style="float: left;
margin: 4px 4px 4px 10px;" border="0"-->
+ <DIV style="margin: 0px 10px 0px 10px" class="smalltext">Apache Struts
2 Documentation</DIV>
+ <DIV style="margin: 0px 10px 8px 10px" class="pagetitle">S2-015</DIV>
+
+ <DIV class="greynavbar" align="right" style="padding: 2px 10px;
margin: 0px;">
+ <A
href="https://cwiki.apache.org/confluence/pages/editpage.action?pageId=31823638";>
+ <IMG
src="https://cwiki.apache.org/confluence/images/icons/notep_16.gif"; height="16"
width="16" border="0" align="absmiddle" title="Edit Page"></A>
+ <A
href="https://cwiki.apache.org/confluence/pages/editpage.action?pageId=31823638";>Edit
Page</A>
+
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href="https://cwiki.apache.org/confluence/pages/listpages.action?key=WW";>
+ <IMG
src="https://cwiki.apache.org/confluence/images/icons/browse_space.gif";
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+ <A
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Space</A>
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+ <A
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height="16" width="16" border="0" align="absmiddle" title="Add Page"></A>
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Page</A>
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+ <A
href="https://cwiki.apache.org/confluence/pages/createblogpost.action?spaceKey=WW&fromPageId=31823638";>
+ <IMG
src="https://cwiki.apache.org/confluence/images/icons/add_blogentry_16.gif";
height="16" width="16" border="0" align="absmiddle" title="Add News"></A>
+ <A
href="https://cwiki.apache.org/confluence/pages/createblogpost.action?spaceKey=WW&fromPageId=31823638";>Add
News</A>
+ </DIV>
+ </DIV>
+
+ <DIV class="pagecontent">
+ <DIV class="wiki-content">
+ <H2><A name="S2-015-Summary"></A>Summary</H2>
+
+
+<P>A vulnerability introduced by forcing parameter inclusion in the
<EM>URL</EM> and <EM>Anchor</EM> Tag allows remote command execution, session
access and manipulation and XSS attacks</P>
+
+
+<DIV class="table-wrap">
+<TABLE class="confluenceTable"><TBODY>
+<TR>
+<TH class="confluenceTh">Who should read this</TH>
+<TD class="confluenceTd">All Struts 2 developers and users</TD>
+</TR>
+<TR>
+<TH class="confluenceTh">Impact of vulnerability</TH>
+<TD class="confluenceTd">Remote command execution, remote server context
manipulation, injection of malicious client side code</TD>
+</TR>
+<TR>
+<TH class="confluenceTh">Maximum security rating</TH>
+<TD class="confluenceTd">Highly Critical</TD>
+</TR>
+<TR>
+<TH class="confluenceTh">Recommendation</TH>
+<TD class="confluenceTd">Developers should immediately upgrade to <A
href="http://struts.apache.org/download.cgi#struts23142"; class="external-link"
rel="nofollow">Struts 2.3.14.2</A></TD>
+</TR>
+<TR>
+<TH class="confluenceTh">Affected Software</TH>
+<TD class="confluenceTd"> Struts 2.0.0 - Struts 2.3.14.1 </TD>
+</TR>
+<TR>
+<TH class="confluenceTh">Reporter</TH>
+<TD class="confluenceTd"> Eric Kobrin and Douglas Rodrigues (Akamai), Coverity
Security Research Laboratory, NSFOCUS Security Team </TD>
+</TR>
+<TR>
+<TH class="confluenceTh">CVE Identifier</TH>
+<TD class="confluenceTd"><A
href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-2115";
class="external-link" rel="nofollow">CVE-2013-2115</A>, <A
href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-1966";
class="external-link" rel="nofollow">CVE-2013-1966</A></TD>
+</TR>
+</TBODY></TABLE>
+</DIV>
+
+
+<H2><A name="S2-015-Problem"></A>Problem</H2>
+
+<P>Both the <A
href="http://struts.apache.org/release/2.3.x/struts2-core/apidocs/org/apache/struts2/components/URL.html";
class="external-link" rel="nofollow"><EM>s:url</EM></A> and <A
href="http://struts.apache.org/release/2.3.x/struts2-core/apidocs/org/apache/struts2/components/Anchor.html";
class="external-link" rel="nofollow"><EM>s:a</EM></A> tag provide an
<EM>includeParams</EM> attribute. </P>
+
+<P>The main scope of that attribute is to understand whether includes http
request parameter or not. </P>
+
+<P>The allowed values of includeParams are:</P>
+<OL>
+ <LI><EM>none</EM> - include no parameters in the URL (default)</LI>
+ <LI><EM>get</EM> - include only GET parameters in the URL</LI>
+ <LI><EM>all</EM> - include both GET and POST parameters in the URL</LI>
+</OL>
+
+
+<P>A request that included a specially crafted request parameter could be used
to inject arbitrary OGNL code into the stack, afterward used as request
parameter of an <EM>URL</EM> or <EM>A</EM> tag , which will cause a further
evaluation. </P>
+
+<P>The second evaluation happens when the URL/A tag tries to resolve every
parameters present in the original request.<BR>
+This lets malicious users put arbitrary OGNL statements into any request
parameter (not necessarily managed by the code) and have it evaluated as an
OGNL expression to enable method execution and execute arbitrary methods,
bypassing Struts and OGNL library protections.</P>
+
+<P>The issue was originally addressed by Struts 2.3.14.1 and Security
Announcement <A href="s2-013.html" title="S2-013">S2-013</A>. However, the
solution introduced with 2.3.14.1 did not address all possible attack vectors,
such that <B>every</B> version of Struts 2 before 2.3.14.2 is still vulnerable
to such attacks.</P>
+
+<H2><A name="S2-015-Proofofconcept"></A>Proof of concept</H2>
+
+<OL>
+ <LI>Open HelloWorld.jsp present in the Struts Blank App and add to one
of the url/a tag the following parameter:
+<DIV class="code panel" style="border-width: 1px;"><DIV class="codeContent
panelContent">
+<PRE class="code-java">
+ includeParams=<SPAN class="code-quote">"all"</SPAN>
+</PRE>
+</DIV></DIV>
+<P>Such that the line will be something look like this:</P>
+<DIV class="code panel" style="border-width: 1px;"><DIV class="codeContent
panelContent">
+<PRE class="code-xml">
+<SPAN class="code-tag"><s:url id=<SPAN
class="code-quote">"url"</SPAN> action=<SPAN
class="code-quote">"HelloWorld"</SPAN> includeParams=<SPAN
class="code-quote">"all"</SPAN>></SPAN>
+</PRE>
+</DIV></DIV></LI>
+ <LI>Run struts2-blank app</LI>
+ <LI>Open the following url, resulting in calc application opening on
Windows (try ....exec('open%20.')} to open a Finder window on Mac OS):
+ <DIV class="code panel" style="border-width: 1px;"><DIV class="codeContent
panelContent">
+<PRE class="code-java">http:<SPAN
class="code-comment">//localhost:8080/struts2-blank/example/HelloWorld.action?aaa=1${%23_memberAccess[%22allowStaticMethodAccess%22]=<SPAN
class="code-keyword">true</SPAN>,@java.lang.<SPAN
class="code-object">Runtime</SPAN>@getRuntime().exec('calc')}</SPAN></PRE>
+</DIV></DIV></LI>
+ <LI>Open the following url to modify session content:
+ <DIV class="code panel" style="border-width: 1px;"><DIV class="codeContent
panelContent">
+<PRE class="code-java">http:<SPAN
class="code-comment">//localhost:8080/struts2-blank/example/HelloWorld.action?aaa=1${%23session[%22hacked%22]='<SPAN
class="code-keyword">true</SPAN>'}</SPAN></PRE>
+</DIV></DIV></LI>
+ <LI>Open the following url to print out session content and in
combination with the previous example introduce arbitrary code into the
resulting HTML output:
+ <DIV class="code panel" style="border-width: 1px;"><DIV class="codeContent
panelContent">
+<PRE class="code-java">http:<SPAN
class="code-comment">//localhost:8080/struts2-blank/example/HelloWorld.action?aaa=1${%23session[%22hacked%22]}</SPAN></PRE>
+</DIV></DIV></LI>
+</OL>
+
+
+<P>As you will notice, in this case, there is no way to escape/sanitize the
malicious parameter, since it's not an expected parameter and even will not get
evaluated the request parameters are processed. </P>
+
+<H2><A name="S2-015-Solution"></A>Solution</H2>
+
+<P>The URL rendering subsystem was changed to not pass any parameter name or
value to OGNL evaluation.</P>
+
+<P>The MemberAccess component's allowStaticMethodAccess property is now
immutable.</P>
+
+<DIV class="panelMacro"><TABLE class="noteMacro"><COLGROUP><COL
width="24"><COL></COLGROUP><TR><TD valign="top"><IMG
src="https://cwiki.apache.org/confluence/images/icons/emoticons/warning.gif";
width="16" height="16" align="absmiddle" alt="" border="0"></TD><TD><B>Backward
Compatibility</B><BR>A small amount of very elaborated <EM>URL</EM> or
<EM>A</EM> tag usages depending on the now disabled evaluation might produce
unexpected results now.<BR>
+Please, ensure that
+<OL>
+ <LI>all expressions that should get evaluated are explicitly introduced
via <EM>PARAM</EM> tags within <EM>URL</EM> or <EM>A</EM> tags.</LI>
+ <LI>all expressions used in <EM>PARAM</EM> tags come from a sanitized
input.</LI>
+</OL>
+</TD></TR></TABLE></DIV>
+
+<DIV class="panelMacro"><TABLE class="warningMacro"><COLGROUP><COL
width="24"><COL></COLGROUP><TR><TD valign="top"><IMG
src="https://cwiki.apache.org/confluence/images/icons/emoticons/forbidden.gif";
width="16" height="16" align="absmiddle" alt="" border="0"></TD><TD><B>It is
strongly recommended to upgrade to <A
href="http://struts.apache.org/download.cgi#struts23142"; class="external-link"
rel="nofollow">Struts 2.3.14.2</A>, which contains the corrected OGNL and XWork
library.</B></TD></TR></TABLE></DIV>
+ </DIV>
+
+
+ </DIV>
+ </DIV>
+ <DIV class="footer">
+ Generated by
+ <A href="http://www.atlassian.com/confluence/";>Atlassian Confluence</A>
(Version: 3.4.9 Build: 2042 Feb 14, 2011)
+ <A href="http://could.it/autoexport/";>Auto Export Plugin</A> (Version:
1.0.0-dkulp)
+ </DIV>
+ </BODY>
+</HTML>
\ No newline at end of file
Modified:
websites/production/struts/content/development/2.x/docs/security-bulletins.html
==============================================================================
---
websites/production/struts/content/development/2.x/docs/security-bulletins.html
(original)
+++
websites/production/struts/content/development/2.x/docs/security-bulletins.html
Tue Jun 4 16:01:40 2013
@@ -124,8 +124,7 @@ under the License.
<DIV class="pagecontent">
<DIV class="wiki-content">
<P>The following security bulletins are available:</P>
-
-<UL><LI><A href="s2-001.html" title="S2-001">S2-001</A> — <SPAN
class="smalltext">Remote code exploit on form validation
error</SPAN></LI><LI><A href="s2-002.html" title="S2-002">S2-002</A> —
<SPAN class="smalltext">Cross site scripting (XSS) vulnerability on
<s:url> and <s:a> tags</SPAN></LI><LI><A href="s2-003.html"
title="S2-003">S2-003</A> — <SPAN class="smalltext">XWork
ParameterInterceptors bypass allows OGNL statement execution</SPAN></LI><LI><A
href="s2-004.html" title="S2-004">S2-004</A> — <SPAN
class="smalltext">Directory traversal vulnerability while serving static
content</SPAN></LI><LI><A href="s2-005.html" title="S2-005">S2-005</A> —
<SPAN class="smalltext">XWork ParameterInterceptors bypass allows remote
command execution</SPAN></LI><LI><A href="s2-006.html"
title="S2-006">S2-006</A> — <SPAN class="smalltext">Multiple Cross-Site
Scripting (XSS) in XWork generated error pages</SPAN></LI><LI><A
href="s2-007.html" t
itle="S2-007">S2-007</A> — <SPAN class="smalltext">User input is
evaluated as an OGNL expression when there's a conversion
error</SPAN></LI><LI><A href="s2-008.html" title="S2-008">S2-008</A> —
<SPAN class="smalltext">Multiple critical vulnerabilities in
Struts2</SPAN></LI><LI><A href="s2-009.html" title="S2-009">S2-009</A> —
<SPAN class="smalltext">ParameterInterceptor vulnerability allows remote
command execution</SPAN></LI><LI><A href="s2-010.html"
title="S2-010">S2-010</A> — <SPAN class="smalltext">When using Struts 2
token mechanism for CSRF protection, token check may be bypassed by misusing
known session attributes</SPAN></LI><LI><A href="s2-011.html"
title="S2-011">S2-011</A> — <SPAN class="smalltext">Long request
parameter names might significantly promote the effectiveness of DOS
attacks</SPAN></LI><LI><A href="s2-012.html" title="S2-012">S2-012</A> —
<SPAN class="smalltext">Showcase app vulnerability allows remote command execut
ion</SPAN></LI><LI><A href="s2-013.html" title="S2-013">S2-013</A> —
<SPAN class="smalltext">A vulnerability, present in the <EM>includeParams</EM>
attribute of the <EM>URL</EM> and <EM>Anchor</EM> Tag, allows remote command
execution</SPAN></LI><LI><A href="s2-014.html" title="S2-014">S2-014</A>
— <SPAN class="smalltext">A vulnerability introduced by forcing parameter
inclusion in the <EM>URL</EM> and <EM>Anchor</EM> Tag allows remote command
execution, session access and manipulation and XSS attacks</SPAN></LI><LI><A
href="https://cwiki.apache.org/confluence/display/WW/S2-015";
title="S2-015">S2-015</A> — <SPAN class="smalltext">A vulnerability
introduced by wildcard matching mechanism or double evaluation of OGNL
Expression allows remote command execution</SPAN></LI></UL>
+<UL><LI><A href="s2-001.html" title="S2-001">S2-001</A> — <SPAN
class="smalltext">Remote code exploit on form validation
error</SPAN></LI><LI><A href="s2-002.html" title="S2-002">S2-002</A> —
<SPAN class="smalltext">Cross site scripting (XSS) vulnerability on
<s:url> and <s:a> tags</SPAN></LI><LI><A href="s2-003.html"
title="S2-003">S2-003</A> — <SPAN class="smalltext">XWork
ParameterInterceptors bypass allows OGNL statement execution</SPAN></LI><LI><A
href="s2-004.html" title="S2-004">S2-004</A> — <SPAN
class="smalltext">Directory traversal vulnerability while serving static
content</SPAN></LI><LI><A href="s2-005.html" title="S2-005">S2-005</A> —
<SPAN class="smalltext">XWork ParameterInterceptors bypass allows remote
command execution</SPAN></LI><LI><A href="s2-006.html"
title="S2-006">S2-006</A> — <SPAN class="smalltext">Multiple Cross-Site
Scripting (XSS) in XWork generated error pages</SPAN></LI><LI><A
href="s2-007.html" t
itle="S2-007">S2-007</A> — <SPAN class="smalltext">User input is
evaluated as an OGNL expression when there's a conversion
error</SPAN></LI><LI><A href="s2-008.html" title="S2-008">S2-008</A> —
<SPAN class="smalltext">Multiple critical vulnerabilities in
Struts2</SPAN></LI><LI><A href="s2-009.html" title="S2-009">S2-009</A> —
<SPAN class="smalltext">ParameterInterceptor vulnerability allows remote
command execution</SPAN></LI><LI><A href="s2-010.html"
title="S2-010">S2-010</A> — <SPAN class="smalltext">When using Struts 2
token mechanism for CSRF protection, token check may be bypassed by misusing
known session attributes</SPAN></LI><LI><A href="s2-011.html"
title="S2-011">S2-011</A> — <SPAN class="smalltext">Long request
parameter names might significantly promote the effectiveness of DOS
attacks</SPAN></LI><LI><A href="s2-012.html" title="S2-012">S2-012</A> —
<SPAN class="smalltext">Showcase app vulnerability allows remote command execut
ion</SPAN></LI><LI><A href="s2-013.html" title="S2-013">S2-013</A> —
<SPAN class="smalltext">A vulnerability, present in the <EM>includeParams</EM>
attribute of the <EM>URL</EM> and <EM>Anchor</EM> Tag, allows remote command
execution</SPAN></LI><LI><A href="s2-014.html" title="S2-014">S2-014</A>
— <SPAN class="smalltext">A vulnerability introduced by forcing parameter
inclusion in the <EM>URL</EM> and <EM>Anchor</EM> Tag allows remote command
execution, session access and manipulation and XSS attacks</SPAN></LI><LI><A
href="s2-015.html" title="S2-015">S2-015</A> — <SPAN class="smalltext">A
vulnerability introduced by wildcard matching mechanism or double evaluation of
OGNL Expression allows remote command execution</SPAN></LI></UL>
</DIV>
<DIV class="tabletitle">
@@ -178,7 +177,7 @@ under the License.
<A href="s2-014.html" title="S2-014">S2-014</A>
<SPAN class="smalltext">(Apache Struts 2 Documentation)</SPAN>
<BR>
- <A
href="https://cwiki.apache.org/confluence/display/WW/S2-015";
title="S2-015">S2-015</A>
+ <A href="s2-015.html" title="S2-015">S2-015</A>
<SPAN class="smalltext">(Apache Struts 2 Documentation)</SPAN>
<BR>
</DIV>
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