Null - C experts: I can execute shellcode if I hardcode it as an array of unsigned chars, but if I read it from stdin (as binary) to an array of same, it seg faults. Can't see any difference (i.e. null byte) in gdb. Any thoughts?

7:07am PDT - July 12th, 2023

C experts: I can execute shellcode if I hardcode it as an array of unsigned chars, but if I read it from stdin (as binary) to an array of same, it seg faults. Can't see any difference (i.e. null byte) in gdb. Any thoughts?

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Dan Klinedinst @imdklined@infosec.exchange/coso (@dklinedinst)