Symlink attack due to predictable tmp folder names Affecting npm Open this link in a new tab package, versions <1.3.3

  • Attack Complexity


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  • snyk-id


  • published

    13 Feb 2017

  • disclosed

    7 Jul 2013

  • credit

    Daniel Kahn Gillmor

How to fix?

Upgrade npm to version 1.3.3 or higher.


npm is a package manager for JavaScript. Affected versions of the package are vulnerable to Symlink attack due to predictable tmp folder names, which were named /tmp/npm-$PID. An attacker waiting for a process named npm- to load could then go to the folder and arbitrarily change the files in the tmp folder.