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Team meeting Oct 6, 2011

Team meeting Oct 6, 2011. Bart Coppens. Program differences can be observed. Version 1. Version 2. Security hole fixed New features Watermarks. What changed?. Attacker will use tools to reduce search space. Version 1. Version 2. patch. irrelevant changes.

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Team meeting Oct 6, 2011

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  1. Team meetingOct 6, 2011 Bart Coppens

  2. Program differencescan be observed Version 1 Version 2 • Security hole fixed • New features • Watermarks What changed?

  3. Attacker will use tools to reduce search space Version 1 Version 2 patch irrelevant changes

  4. How toreduce the search space?bsdiff/xdelta (1) Unfilteredresults (2) Filter relocatableaddresses (3) Opcodechanged (4) Executed code & filteredrelocatebleaddresses (5) Executed code & opcodechanged

  5. xdelta on BZip2

  6. bsdiff on BZip2

  7. How toreduce the search space?BinDiff Simple analysis,unfiltered (5) Full analysis, unfiltered (2) Simple analysis, problemsfiltered (3) Executed code of simpleanalysis (6) Full analysis, problemsfiltered (4) Exec code of simple analysis, problemsfiltered (7) Exec code of full analysis (8) Exec code of full analysis,problemsfiltered

  8. BinDiff on BZip2

  9. More complex behavior:xdelta on soplex

  10. Soplex at p1 diversity, xdelta

  11. Soplex at p1 diversity, bindiff

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