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IT18965: AUTHENTICATION BYPASS USING HTTP VERB TAMPERING

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APAR status

  • Closed as program error.

Error description

  • Using specific IBM Sterling B2B Integrator .js and .jsp scripts,
    it may be possible to escalate user privileges and gain
    administrative permissions over the web application.
    
    It is possible to gather sensitive information about the web
    application such as usernames, passwords, machine name and/or
    sensitive file locations.
    

Local fix

  • STRRTC - 526361
    SB/SB
    Circumvention:
    
    1. Modify <Install_dir>/noapp/etc/webdefault.xml.in as follows.
        Replace the following content at the end of file
    
        <security-constraint>
        <web-resource-collection>
          <web-resource-name>Disable TRACE</web-resource-name>
          <url-pattern>/*</url-pattern>
          <http-method>TRACE</http-method>
        </web-resource-collection>
        <auth-constraint/>
      </security-constraint>
    
      <security-constraint>
        <web-resource-collection>
          <web-resource-name>Disable MOVE</web-resource-name>
          <url-pattern>/*</url-pattern>
          <http-method>MOVE</http-method>
        </web-resource-collection>
        <auth-constraint/>
      </security-constraint>
    
       <security-constraint>
        <web-resource-collection>
          <web-resource-name>Disable MOVE</web-resource-name>
          <url-pattern>/*</url-pattern>
          <http-method>MOVE</http-method>
        </web-resource-collection>
        <auth-constraint/>
      </security-constraint>
    
      <security-constraint>
        <web-resource-collection>
          <web-resource-name>Disable DELETE</web-resource-name>
          <url-pattern>/*</url-pattern>
          <http-method>DELETE</http-method>
        </web-resource-collection>
        <auth-constraint/>
      </security-constraint>
    
      <security-constraint>
        <web-resource-collection>
          <web-resource-name>Disable OPTIONS</web-resource-name>
          <url-pattern>/*</url-pattern>
          <http-method>OPTIONS</http-method>
        </web-resource-collection>
        <auth-constraint/>
      </security-constraint>
    
      with the following content.
    
      <security-constraint>
        <web-resource-collection>
            <web-resource-name>Allowed methods</web-resource-name>
            <url-pattern>/*</url-pattern>
            <http-method>GET</http-method>
            <http-method>POST</http-method>
            <http-method>HEADER</http-method>
        </web-resource-collection>
      </security-constraint>
    
      <security-constraint>
        <web-resource-collection>
            <web-resource-name>Restricted
    methods</web-resource-name>
            <url-pattern>/*</url-pattern>
        </web-resource-collection>
        <auth-constraint />
    </security-constraint>
    
    2. Change directory to <B2Bi Install_dir>/bin and run
    setupfiles.sh
    
    3.  Restart B2Bi
    

Problem summary

  • Users Affected:
    All
    
    Problem Description:
    Authentication Bypass Using HTTP Verb Tampering.
    
    Platforms Affected:
    All
    

Problem conclusion

  • Resolution Summary:
    A code fix is provided.
    
    Delivered In:
    5020603_2
    5020500_16
    5020601_8
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT18965

  • Reported component name

    STR B2B INTEGRA

  • Reported component ID

    5725D0600

  • Reported release

    526

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-01-24

  • Closed date

    2017-06-02

  • Last modified date

    2017-08-04

  • 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

    STR B2B INTEGRA

  • Fixed component ID

    5725D0600

Applicable component levels

  • R526 PSY

       UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS3JSW","label":"IBM Sterling B2B Integrator"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"5.2.6","Edition":"","Line of Business":{"code":"LOB02","label":"AI Applications"}}]

Document Information

Modified date:
04 August 2017