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PI67257: AN ESCAPED EL EXPRESSION IS BEING EVALUATED IF AN ESCAPED DOLLAR SIGN PRECEDES THE FORMER EXPRESSION

Fixes are available

9.0.0.2: WebSphere Application Server traditional V9.0 Fix Pack 2
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
16.0.0.4: WebSphere Application Server Liberty 16.0.0.4
9.0.0.3: WebSphere Application Server traditional V9.0 Fix Pack 3
9.0.0.4: WebSphere Application Server traditional V9.0 Fix Pack 4
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
9.0.0.5: WebSphere Application Server traditional V9.0 Fix Pack 5
9.0.0.6: WebSphere Application Server traditional V9.0 Fix Pack 6
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
9.0.0.7: WebSphere Application Server traditional V9.0 Fix Pack 7
17.0.0.1: WebSphere Application Server Liberty 17.0.0.1
17.0.0.2: WebSphere Application Server Liberty 17.0.0.2
17.0.0.3: WebSphere Application Server Liberty 17.0.0.3
17.0.0.4: WebSphere Application Server Liberty 17.0.0.4
18.0.0.1: WebSphere Application Server Liberty 18.0.0.1
18.0.0.2: WebSphere Application Server Liberty 18.0.0.2
9.0.0.8: WebSphere Application Server traditional V9.0 Fix Pack 8
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
9.0.0.9: WebSphere Application Server traditional V9.0 Fix Pack 9
18.0.0.3: WebSphere Application Server Liberty 18.0.0.3
9.0.0.10: WebSphere Application Server traditional V9.0 Fix Pack 10
18.0.0.4: WebSphere Application Server Liberty 18.0.0.4
19.0.0.1: WebSphere Application Server Liberty 19.0.0.1
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
19.0.0.2: WebSphere Application Server Liberty 19.0.0.2
19.0.0.3: WebSphere Application Server Liberty 19.0.0.3
9.0.0.11: WebSphere Application Server traditional V9.0 Fix Pack 11
19.0.0.4: WebSphere Application Server Liberty 19.0.0.4
19.0.0.5: WebSphere Application Server Liberty 19.0.0.5
9.0.5.0: WebSphere Application Server traditional Version 9.0.5 Refresh Pack
19.0.0.6: WebSphere Application Server Liberty 19.0.0.6
19.0.0.7: WebSphere Application Server Liberty 19.0.0.7
19.0.0.8: WebSphere Application Server Liberty 19.0.0.8
9.0.5.1: WebSphere Application Server traditional Version 9.0.5 Fix Pack 1
19.0.0.9: WebSphere Application Server Liberty 19.0.0.9
19.0.0.10: WebSphere Application Server Liberty 19.0.0.10
19.0.0.11: WebSphere Application Server Liberty 19.0.0.11
9.0.5.2: WebSphere Application Server traditional Version 9.0.5 Fix Pack 2
19.0.0.12: WebSphere Application Server Liberty 19.0.0.12
20.0.0.1: WebSphere Application Server Liberty 20.0.0.1
20.0.0.2: WebSphere Application Server Liberty 20.0.0.2
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
9.0.5.3: WebSphere Application Server traditional Version 9.0.5 Fix Pack 3
20.0.0.3: WebSphere Application Server Liberty 20.0.0.3
20.0.0.4: WebSphere Application Server Liberty 20.0.0.4
20.0.0.5: WebSphere Application Server Liberty 20.0.0.5
20.0.0.6: WebSphere Application Server Liberty 20.0.0.6
9.0.5.4: WebSphere Application Server traditional Version 9.0.5 Fix Pack 4
20.0.0.7: WebSphere Application Server Liberty 20.0.0.7
20.0.0.8: WebSphere Application Server Liberty 20.0.0.8
9.0.5.5: WebSphere Application Server traditional Version 9.0.5 Fix Pack 5
20.0.0.9: WebSphere Application Server Liberty 20.0.0.9
20.0.0.10: WebSphere Application Server Liberty 20.0.0.10
20.0.0.11: WebSphere Application Server Liberty 20.0.0.11
20.0.0.12: WebSphere Application Server Liberty 20.0.0.12
9.0.5.6: WebSphere Application Server traditional Version 9.0.5 Fix Pack 6

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APAR status

  • Closed as program error.

Error description

  • An escaped EL expression is being run.
    
    Escape JSP code:
    ===========
    
    <!DOCTYPE HTML>
    <%@page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8" isELIgnored="true"%>
    <html>
    <head>
    <title>jspEscape</title>
    <meta http-equiv="Content-Type" content="text/html;
    charset=UTF-8">
    </head>
    <body>
    <div>\#</div>
    <div>\\#</div>
    <div>\$</div>
    <div>\\$</div>
    <div>${pageContext.request.contextPath}</div>
    <div>${pageContext.request.contextPath}</div>
    </body>
    </html>
    
    \#
    \\#
    \$
    \\$
    ${pageContext.request.contextPath}
    ${pageContext.request.contextPath}
    
    
    *********
    Escape JSP code:
    ===========
    <!DOCTYPE HTML>
    <%@page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8" isELIgnored="false"%>
    <html>
    <head>
    <title>jspEscape</title>
    <meta http-equiv="Content-Type" content="text/html;
    charset=UTF-8">
    </head>
    <body>
    <div>\#</div>
    <div>\\#</div>
    <div>\$</div>
    <div>\\$</div>
    <div>\${pageContext.request.contextPath}</div>
    <div>\${pageContext.request.contextPath}</div>
    </body>
    </html>
    
    Output:
    =====
    #
    \#
    $
    \$
    /jspescape
    ${pageContext.request.contextPath}
    
    ***********
    Escape JSP code:
    ===========
    <!DOCTYPE HTML>
    <%@page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <html>
    <head>
    <title>jspEscape</title>
    <meta http-equiv="Content-Type" content="text/html;
    charset=UTF-8">
    </head>
    <body>
    <div>\#</div>
    <div>\\#</div>
    <div>\$</div>
    <div>\\$</div>
    <div>\${pageContext.request.contextPath}</div>
    <div>\${pageContext.request.contextPath}</div>
    </body>
    </html>
    
    Output:
    =====
    #
    \#
    $
    \$
    /jspescape
    ${pageContext.request.contextPath}
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  IBM WebSphere Application Server            *
    *                  Traditional versions 8.5.5, and 9.0 and     *
    *                  WebSphere Application Server Liberty        *
    ****************************************************************
    * PROBLEM DESCRIPTION: An Expression Language (EL)             *
    *                      expression is evaluated if an escaped   *
    *                      dollar sign ($) character precedes it.  *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    An EL expression will be evaluated if it is preceded by an
    escaped dollar sign (\$).
    Example:
    JSP file:
    <%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8" isELIgnored="false"%>
    \$
    \${pageContext.request.contextPath}
    \${pageContext.request.contextPath}
    Output:
    $
    /webModuleContextPath
    ${pageContext.request.contextPath}
    Expected output:
    $
    ${pageContext.request.contextPath}
    ${pageContext.request.contextPath}
    

Problem conclusion

  • The JSP container code was modified to correctly escape EL
    expressions that are preceded by an escaped dollar sign.
    
    The fix for this APAR is currently targeted for inclusion in
    fix packs 8.5.5.11, 9.0.0.2, and 16.0.0.4.  Please refer to the
    Recommended Updates page for delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI67257

  • Reported component name

    WEBSPHERE APP S

  • Reported component ID

    5724J0800

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-08-09

  • Closed date

    2016-08-30

  • Last modified date

    2016-11-10

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    WEBSPHERE APP S

  • Fixed component ID

    5724J0800

Applicable component levels

  • R700 PSY

       UP

  • R800 PSY

       UP

  • R850 PSY

       UP

  • R900 PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"850","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
14 October 2021