Arbitrary File Write via Archive Extraction (Zip Slip) Affecting org.apache.storm:storm-server package, versions [,2.0.0)
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6 Jun 2018
4 May 2018
Snyk Security research Team
How to fix?
org.apache.storm:storm-server to version 2.0.0 or higher.
org.apache.storm:storm-server is a distributed realtime computation system.
Affected versions of this package are vulnerable to Arbitrary File Write via Archive Extraction (Zip Slip).
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
+2018-04-15 22:04:29 ..... 19 19 good.txt
+2018-04-15 22:04:42 ..... 20 20 ../../../../../../root/.ssh/authorized_keys