Vulnerabilities

1 via 1 paths

Dependencies

2

Source

GitHub

Commit

c4365b37

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medium severity

Arbitrary File Write via Archive Extraction (Zip Slip)

  • Vulnerable module: org.gradle:gradle-tooling-api
  • Introduced through: org.gradle:gradle-tooling-api@8.13

Detailed paths

  • Introduced through: adaptris/interlok-installer@adaptris/interlok-installer#c4365b37ea57b3b5b02c6a8e532e55e595918112 org.gradle:gradle-tooling-api@8.13

Overview

Affected versions of this package are vulnerable to Arbitrary File Write via Archive Extraction (Zip Slip) that allows files to be written into an unintended location outside the provided Tar unpack location. It also allows reading files outside the intended Tar archive location. An attacker in control of an archive already used by the build or the relevant build configuration can exploit this. It is unlikely that this would go unnoticed. This Zip Slip variant may also be called "Tar Slip".

Details

It is exploited using a specially crafted zip archive, that holds path traversal filenames. When exploited, a filename in a malicious archive is concatenated to the target extraction directory, which results in the final path ending up outside of the target folder. For instance, a zip may hold a file with a "../../file.exe" location and thus break out of the target folder. If an executable or a configuration file is overwritten with a file containing malicious code, the problem can turn into an arbitrary code execution issue quite easily.

The following is an example of a zip archive with one benign file and one malicious file. Extracting the malicous file will result in traversing out of the target folder, ending up in /root/.ssh/ overwriting the authorized_keys file:


+2018-04-15 22:04:29 ..... 19 19 good.txt

+2018-04-15 22:04:42 ..... 20 20 ../../../../../../root/.ssh/authorized_keys

Remediation

A fix was pushed into the master branch but not yet published.

References