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Severity: high

Arbitrary File Overwrite



Versions of tar prior to 4.4.2 for 4.x and 2.2.2 for 2.x are vulnerable to Arbitrary File Overwrite. Extracting tarballs containing a hardlink to a file that already exists in the system, and a file that matches the hardlink will overwrite the system's file with the contents of the extracted file.


For tar 4.x, upgrade to version 4.4.2 or later. For tar 2.x, upgrade to version 2.2.2 or later.


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Advisory timeline

  1. published

    Advisory Published
    Apr 12th, 2019
  2. reported

    Reported by Max Justicz
    Apr 4th, 2019