Bug #47

Displaying a SSL certificate make the VM to crash

Added by Anonymous almost 17 years ago. Updated over 16 years ago.

Status:NewStart date:
Priority:NormalDue date:
Assignee:Alain Prouté% Done:

0%

Category:Virtual Machine
Target version:1.10
Platform: Triage Stage:
Resolution:

Description

Using the function to_string(X509) can crash the VM (at least on Windows), depending of the content of the certificate.

History

#1 Updated by Alain Prouté almost 17 years ago

This problem is known since the beginning. Probably a bug in SSL. Cannot do much except encapsulate the SSL call into a 'sigsegv_protect' (macro defined in vm.h). Actually I see that it is already the case, so that I don't understand what you mean by 'crash'.

#2 Updated by Alain Prouté almost 17 years ago

Is SIGSEGV actually trapped under Windows ?

#3 Updated by Anonymous almost 17 years ago

I don't really known ifSIGSEGV is trapped or no under Windows (I think no...), but I'm confident this is not a great maner to check if the certificate is well formed or no. I think we should avoid completely the use of such exceptions that can have very big side effects.

Even more, the error can be masked because the exception doesn't occure (write into allowed memory block, but not into the rigth struct... results are uncertains).

#4 Updated by Alain Prouté almost 17 years ago

The problem is that when we call a third party library function we cannot trust this library. This is why Apache for example encapsulates library calls (and plug-ins calls) into a mecanism using setjmp and longjump and trapping exceptions. I did the same with the macro 'sigsegv_protect'. If we want something better we need to replace the library function by a functoin of our own, either in C or in Anubis.

As far as the printing of X509 certificates is concerned, I thing reasonable to try to do it in Anubis. It should not be too complicated.

#5 Updated by Anonymous over 16 years ago

  • Target version changed from 1.9 to 1.10
  • Platform deleted (Windows)
  • 3 deleted (Not started)

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