Arbitrary File Write via Archive Extraction (Zip Slip) Affecting react-native-code-push package, versions >=1.7.0 <6.3.0


Severity

Recommended
0.0
critical
0
10

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

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 IDSNYK-JS-REACTNATIVECODEPUSH-173775
  • published11 Mar 2019
  • disclosed18 May 2018
  • creditshawnXiao

Introduced: 18 May 2018

CVE NOT AVAILABLE CWE-29  (opens in a new tab)

How to fix?

Upgrade react-native-code-push to version 6.3.0 or higher.

Overview

react-native-code-push provides client-side integration for the CodePush service, allowing you to easily add a dynamic update experience to your React Native app(s).

Affected versions of this package are vulnerable to Arbitrary File Write via Archive Extraction (Zip 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

References

CVSS Scores

version 3.1