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My minimal, memory-safe Go rsync steers clear of vulnerabilities

The article presents a memory-safe implementation of rsync in Go, designed to avoid common vulnerabilities like buffer overflows and memory corruption that plague the original C version. By leveraging Go's type safety and garbage collection, the author created a minimal rsync clone that maintains core functionality while eliminating entire classes of security bugs.

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  • The author assesses 12 rsync vulnerabilities against his Go-based gokrazy/rsync. While both he and upstream missed some validation, Go's bounds-checking prevents memory corruption, and the minimal codebase avoids many attack surfaces. He concludes memory-safe languages and minimal implementations significantly reduce security risks.