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DEF CON 27 CTF challenge: mirror-universe
return of shellql
JS engine exploitation (with a read/write primitive)
Classic format string, NX, no pie, ASLR.
distributed messaging service, bug in FD_SET
pwning challenge with a minimal hypervisor on apple hypervisor framework
Relative write, NX, pie, ASLR, dynamically linked, no canaries
No-null shellcoding challenge with small byte arrays spread throughout.
One-byte buffer overflow, NX, no-pie, ASLR, statically compiled binary.