NPM Users Download 2.1B Deprecated Packages Weekly, Say Security Researchers

The cybersecurity site SC Media reports that NPM registry users "download deprecated packages an estimated 2.1 billion times weekly, according to a statistical analysis of the top 50,000 most-downloaded packages in the registry."Deprecated, archived and "orphaned" NPM packages can contain unpatched and/or unreported vulnerabilities that pose a risk to the projects that depend on them, warned the researchers from Aqua Security's Team Nautilus, who published their findings in a blog post on Sunday... In conjunction with their research, Aqua Nautilus has released an open-source tool that can help developers identify deprecated dependencies in their projects. Open-source software may stop receiving updates for a variety of reasons, and it is up to developers/maintainers to communicate this maintenance status to users. As the researchers pointed out, not all developers are transparent about potential risks to users who download or depend on their outdated NPM packages. Aqua Nautilus researchers kicked off their analysis after finding that one open-source software maintainer responded to a report about a vulnerability Nautilus discovered by archiving the vulnerable repository the same day. By archiving the repository without fixing the security flaw or assigning it a CVE, the owner leaves developers of dependent projects in the dark about the risks, the researchers said... Taking into consideration both deprecated packages and active packages that have a direct dependency on deprecated projects, the researchers found about 4,100 (8.2%) of the top 50,000 most-downloaded NPM packages fell under the category of "official" deprecation. However, adding archived repositories to the definition of "deprecated" increased the number of packages affected by deprecation and deprecated dependencies to 6,400 (12.8%)... Including packages with linked repositories that are shown as unavailable (404 error) on GitHub increases the deprecation rate to 15% (7,500 packages), according to the Nautilus analysis. Encompassing packages without any linked repository brings the final number of deprecated packages to 10,600, or 21.2% of the top 50,000. Team Nautilus estimated that under this broader understanding of package deprecation, about 2.1 billion downloads of deprecated packages are made on the NPM registry weekly.

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