Arbitrary File Write via Archive Extraction (Zip Slip) Affecting org.testng:testng package, versions [,7.5.1) [7.6.0,7.7.0)
Threat Intelligence
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk ID SNYK-JAVA-ORGTESTNG-3040285
- published 20 Nov 2022
- disclosed 5 Oct 2022
- credit Jonathan Leitschuh
How to fix?
Upgrade org.testng:testng to version 7.5.1, 7.7.0 or higher.
Overview
org.testng:testng is a testing framework for the JVM.
Affected versions of this package are vulnerable to Arbitrary File Write via Archive Extraction (Zip Slip) via the testngXmlExistsInJar function.
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