Open Source Software Supply Chain Security: A Half-Century of Challenges
From the 1974 Honeywell Multics system security review highlighting concerns about 'backdoors' to the 2024 XZ attack targeting Debian systems, open source software supply chain security remains a persistent problem. This article explores the complexity of the issue, extending beyond simple dependency graphs to encompass all stages of software building and distribution, including human factors. It proposes solutions such as software authentication, reproducible builds, rapid vulnerability detection and patching, and the use of safer programming languages. Crucially, it emphasizes the importance of funding open source development, as underfunding makes projects vulnerable to malicious takeover. The XZ attack serves as a stark warning: seemingly innocuous 'free help' can conceal significant risks.