https://community.intel.com/t5/Intel-Confidential-Computing/SGX-Foreshadow-vulnerability/m-p/1146605#M2441 <P>Good morning I'm studying SGX vulnerabilities and I'm trying to implement the foreshadow attack as described in <A href="https://github.com/jovanbulck/sgx-step/tree/master/app/foreshadow" target="_blank">https://github.com/jovanbulck/sgx-step/tree/master/app/foreshadow</A>.</P><P>I had some problems in running the sample and I need to make it works for my research and problem, did anyone already try to implement this attack?</P><P>On my Ubuntu cmd line I get the following error when I run the make run command inside the Foreshadow folder:</P><P>/usr/bin/ld: ../../libsgxstep/libsgx-step.a(aep_trampoline.o): relocation R_X86_64_32S against symbol `sgx_step_tcs' can not be used when making a PIE object; recompile with -fPIC<BR />/usr/bin/ld: final link failed: Nonrepresentable section on output<BR />collect2: error: ld returned 1 exit status<BR />Makefile:56: recipe for target 'app' failed<BR />make: *** [app] Error 1</P><P>&nbsp;</P><P>&nbsp;</P><P>Thanks a lot,</P><P>Alessia</P> Tue, 05 Feb 2019 10:55:37 GMT Perissinotto__Alessi 2019-02-05T10:55:37Z https://community.intel.com/t5/Intel-Confidential-Computing/SGX-Foreshadow-vulnerability/m-p/1146605#M2441 <P>Good morning I'm studying SGX vulnerabilities and I'm trying to implement the foreshadow attack as described in <A href="https://github.com/jovanbulck/sgx-step/tree/master/app/foreshadow" target="_blank">https://github.com/jovanbulck/sgx-step/tree/master/app/foreshadow</A>.</P><P>I had some problems in running the sample and I need to make it works for my research and problem, did anyone already try to implement this attack?</P><P>On my Ubuntu cmd line I get the following error when I run the make run command inside the Foreshadow folder:</P><P>/usr/bin/ld: ../../libsgxstep/libsgx-step.a(aep_trampoline.o): relocation R_X86_64_32S against symbol `sgx_step_tcs' can not be used when making a PIE object; recompile with -fPIC<BR />/usr/bin/ld: final link failed: Nonrepresentable section on output<BR />collect2: error: ld returned 1 exit status<BR />Makefile:56: recipe for target 'app' failed<BR />make: *** [app] Error 1</P><P>&nbsp;</P><P>&nbsp;</P><P>Thanks a lot,</P><P>Alessia</P> Tue, 05 Feb 2019 10:55:37 GMT https://community.intel.com/t5/Intel-Confidential-Computing/SGX-Foreshadow-vulnerability/m-p/1146605#M2441 Perissinotto__Alessi 2019-02-05T10:55:37Z