IBM Support

JR51038: VERIFYING HOST NAME DURING AN SSL HANDSHAKE CANNOT BE DISABLED IN THE HTTP CLIENT THAT IS CALLED FOR OUTBOUND HTTP CALLS

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APAR status

  • Closed as program error.

Error description

  • In APAR JR45071, which is included in IBM Business Process
    Manager (BPM) V7.5.1.2, host name verification was introduced
    for the Apache Commons HTTP client 3.1 library that is shipped
    with IBM BPM to protect against MITM ("man-in-the-middle")
    attacks when SSL connections are being established.
    
    This check verifies that the host name the SSL certificate was
    created for matches the host name of the SSL connection.
    However, the host name verification might fail although no MITM
    attack has occurred, for example when load balancers are
    involved.
    

Local fix

Problem summary

  • The problem arises because the Apache Commons HTTP Client 3.1
    that shipped with IBM BPM V7.5.1.2 verifies host names
    unconditionally. It ignores the
    com.ibm.ssl.performURLHostNameVerification Boolean setting in
    the <PROFILE_HOME>/properties/ssl.client.props configuration
    file.
    

Problem conclusion

  • A fix is available for IBM BPM V7.5.1.2 that ensures Apache
    Commons HTTP client 3.1 either verifies the host name or
    suppresses host name verification, depending on the
    com.ibm.ssl.performURLHostNameVerification Boolean setting in
    the <PROFILE_HOME>/properties/ssl.client.props configuration
    file. With the fix applied, you can disable host name
    verification.
    
    On Fix Central (http://www.ibm.com/support/fixcentral), search
    for JR51038:
    
    1. Select IBM Business Process Manager with your edition from
      the product selector, the installed version to the fix pack
      level, and your platform, and then click Continue.
    
    2. Select APAR or SPR, enter JR51038, and click Continue.
    
    When you download fix packages, ensure that you also download
    the readme file for each fix. Review each readme file for
    additional installation instructions and information about the
    fix.
    

Temporary fix

  • Not applicable
    

Comments

APAR Information

  • APAR number

    JR51038

  • Reported component name

    BPM STANDARD

  • Reported component ID

    5725C9500

  • Reported release

    751

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2014-08-15

  • Closed date

    2014-10-15

  • Last modified date

    2014-10-15

  • 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

    BPM STANDARD

  • Fixed component ID

    5725C9500

Applicable component levels

  • R751 PSY

       UP

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Document Information

Modified date:
15 October 2014