Arbitrary File Write via Archive Extraction (Zip Slip) Affecting org.testng:testng package, versions [,7.5.1) [7.6.0,7.7.0)


Severity

0.0
medium
0
10

    Threat Intelligence

    EPSS
    0.11% (44th percentile)

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  • 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

CVSS Scores

version 3.1
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Snyk

6.5 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    None
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NVD

7.8 high
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SUSE

8.8 high
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Red Hat

7 high