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A deep-dive methodology for authorized penetration testing targeting dependency confusion and namespace resolution vulnerabilities across major package ecosystems (npm, PyPI, NuGet, Maven, etc.). This skill details advanced reconnaissance techniques, from analyzing lock files and source maps to exploiting error messages, alongside safe Proof-of-Concept (PoC) creation using DNS canaries for discovery during penetration engagements.

A practical methodology for turning a known vulnerability into a stable working remote exploit. Covers stack overflow, heap exploitation, and Linux kernel pwn, addressing real-world gaps between local CTF success and reliable remote execution: libc version mismatches, heap spray timing, SMEP/SMAP/KASLR, stack alignment, and network buffering. Uses pwntools with GEF/pwndbg, ROPgadget/Ropper, one_gadget, libc-database, and qemu-system.