systeminformation has path traversal in Linux networkStats() that allows symlink-based file disclosure outside /sys/class/net

[ Description ]Official description

systeminformation is a System and OS information library for node.js. Prior to 5.33.14, the Linux networkStats(iface) implementation uses the caller-supplied interface value in an fs.existsSync() check and to build /sys/class/net/<iface> paths, including the operstate path, without verifying that it is a single interface-name segment or that the resolved path remains under /sys/class/net. An attacker who can control iface and create a directory containing symlinked statistics files can use parent-directory components and symlink traversal to make the API return the first line of a file readable by the Node.js process. The package does not expose a network endpoint, and the demonstrated scenario requires local filesystem setup. This issue is fixed in version 5.33.14.

[ Fixes ]Fixes and patches

• systeminformation 5.33.14Fixed version · GitHub Advisories · npm package systeminformation: upgrade to 5.33.14 or later (affected < 5.33.14)

[ Packages ]Affected open-source packages

• systeminformation npmAffected < 5.33.14 · fixed in 5.33.14 · GHSA-4vjg-vx72-qq4g

[ References ]References

• github.com/sebhildebrandt/systeminformation/commit/8d294b3139fec654a912969ac898037578a2…
• github.com/sebhildebrandt/systeminformation/releases/tag/v5.33.14
• github.com/sebhildebrandt/systeminformation/security/advisories/GHSA-4vjg-vx72-qq4g