[tor-bugs] #20322 [Applications/Tor Browser]: SafeSEH support for mingw-w64 for Tor Browser on Windows

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#20322: SafeSEH support for mingw-w64 for Tor Browser on Windows
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 Reporter:  bugzilla                             |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-security, TorBrowserTeam201711,  |  Actual Points:
  GeorgKoppen201711                              |
Parent ID:  #21777                               |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor4
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Comment (by cypherpunks):

 Replying to [comment:6 gk]:
 > I did some digging and with our GCC-based toolchain this is tricky right
 now.
 Read comment:3. There is nothing tricky in adding one flag.
 > Thus, it makes no sense to fix this bug right now for the current
 toolchain.
 Quite the opposite.
 > There is a very real security benefit to this, mainly because it's so
 easy for malware to corrupt the SEH chain. Once the SEH chain is
 corrupted, it's typically very easy to cause an exception, at which point
 the exception handling machinery will go and dispatch execution to the
 handlers indicated in the chain. If a handler points into a DLL which
 doesn't have NO-SEH or SAFESEH, execution will transfer to that address
 without trouble.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20322#comment:7>
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