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Presentatie over blackboard security

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Presentatie over Blackboard Security voor NLBBUG op 27 januari 2011

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Presentatie over blackboard security

  1. 1. Blackboard Security what can you do? Ir. Willem van Valkenburg
  2. 2. Agenda <ul><li>Security Threats </li></ul><ul><li>Server settings </li></ul><ul><li>SSL </li></ul><ul><li>Session Fingerprinting </li></ul><ul><li>XSS Control </li></ul><ul><li>Privileges and rights </li></ul><ul><li>Questions and discussion </li></ul>
  3. 3. Security threats <ul><li>Unauthorized access to server via OS or software </li></ul><ul><li>Denial of Service ( DoS ) attacks </li></ul><ul><li>Sensitive information is read or changed in an unauthorized manner </li></ul><ul><li>Sensitive information transmitted unencrypted between server and client </li></ul>Source: http://csrc.nist.gov/publications/nistpubs/800-123/SP800-123.pdf
  4. 4. Server <ul><li>Keep your server up-to-date </li></ul><ul><ul><li>Blackboard is using an ancient version of Apache! </li></ul></ul><ul><li>Firewall </li></ul><ul><li>Logging and monitoring </li></ul><ul><li>Backup </li></ul><ul><li>Personnel </li></ul>
  5. 5. BbPatch <ul><li>Easy way to apply a custom fix </li></ul><ul><li>Info: http://kb.blackboard.com/x/MYYQAw </li></ul><ul><li>Patches available: </li></ul><ul><ul><li>Interactive Tool Link Issues after Modifying Content Item </li></ul></ul><ul><ul><li>When editing content in the Visual Editor following an upgrade to Learn 9.1, images and other embedded files are broken </li></ul></ul><ul><ul><li>Course table of contents copy failures cause file permission issues for students </li></ul></ul><ul><ul><li>Course copies retain content links to the source course causing broken content links </li></ul></ul><ul><ul><li>Double-clicking in an assessment causes &quot;Access Denied&quot; errors </li></ul></ul><ul><ul><li>Following an upgrade to 9.1 SP2 guest users are unable to access course content and receive NullPointerExceptions </li></ul></ul><ul><ul><li>Batch Upload process stops after 100 errors </li></ul></ul>
  6. 6. SSL <ul><li>Blackboard supports SSL </li></ul><ul><li>Recommendation is System-wide </li></ul><ul><li>It is possible to exclude parts, such as a building block. See System Admin > SSL Choice </li></ul><ul><li>Don’t forget LDAPS </li></ul><ul><li>Don’t forget to have up-to-date browsers on campus with recent root-certificates </li></ul><ul><li>Discussion: How to deal with mixed content? </li></ul>
  7. 7. Session Fingerprinting
  8. 8. Cross-site Scripting Security Control <ul><li>Included in 9.1 SP1 </li></ul><ul><li>XSS vulnerabilities occur when untrusted data is used by a web application, typically entered through a web request. </li></ul><ul><li>The XSS Security Control is not enabled by default. </li></ul><ul><li>2 modes: FilterDangerousHtml and FilterAllHtml </li></ul><ul><ul><li>FilterDangerousHtml is recommended setting </li></ul></ul><ul><li>There is an exception list </li></ul>Source: http://kb.blackboard.com/x/jQC6Aw
  9. 9. Privileges and rights <ul><li>Disable the privileges and tools you don’t use </li></ul><ul><li>Limit the users with access to System Admin panel </li></ul><ul><li>Set permit Instructors to Turn Grade History On and Off to No </li></ul><ul><li>Set Persistent Cookies to No </li></ul>
  10. 10. Stay up-to-date <ul><li>Subscribe to mailinglists : </li></ul><ul><ul><li>[email_address] </li></ul></ul><ul><ul><li>[email_address] </li></ul></ul><ul><ul><li>[email_address] </li></ul></ul><ul><ul><li>[email_address] (for Content System) </li></ul></ul><ul><ul><li>[email_address] (for developers) </li></ul></ul><ul><ul><li>[email_address] (for developers) </li></ul></ul><ul><li>Subscribe to knowledge base </li></ul><ul><ul><li>Set your watch settings </li></ul></ul><ul><ul><li>Set your e-mail settings </li></ul></ul>
  11. 11. Questions and Discussion

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