Arbitrary File Write via Archive Extraction (Zip Slip) Affecting org.gradle:gradle-dependency-management package, versions [0,]


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.06% (27th percentile)

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  • Snyk IDSNYK-JAVA-ORGGRADLE-5750784
  • published3 Jul 2023
  • disclosed3 Jul 2023
  • creditUnknown

Introduced: 3 Jul 2023

CVE-2023-35946  (opens in a new tab)
CWE-29  (opens in a new tab)

How to fix?

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

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 dependency cache or replacing another file in the dependency cache. An attacker in control of a dependency repository or the relevant build configuration can poison the dependency cache or overwrite important files elsewhere on the filesystem. It is unlikely that this would go unnoticed.

Workaround

This effects of this vulnerability can be reduced by implementing dependency verification.

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

CVSS Scores

version 3.1