chownr@1.0.1 vulnerabilities

like `chown -R`

Direct Vulnerabilities

Known vulnerabilities in the chownr package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
  • M
Time of Check Time of Use (TOCTOU)

chownr is a package that takes the same arguments as fs.chown()

Affected versions of this package are vulnerable to Time of Check Time of Use (TOCTOU). Affected versions of this package are vulnerable toTime of Check Time of Use (TOCTOU) attacks.

It does not dereference symbolic links and changes the owner of the link, which can trick it into descending into unintended trees if a non-symlink is replaced by a symlink at a critical moment:

      fs.lstat(pathChild, function(er, stats) {
        if (er)
          return cb(er)
        if (!stats.isSymbolicLink())
          chownr(pathChild, uid, gid, then)

How to fix Time of Check Time of Use (TOCTOU)?

Upgrade chownr to version 1.1.0 or higher.

<1.1.0