Arbitrary File Write via Archive Extraction (Zip Slip) Affecting github.com/marmelroy/Zip package, versions >=0.0.0
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Test your applications- Snyk ID SNYK-SWIFT-MARMELROYZIP-5876622
- published 31 Aug 2023
- disclosed 31 Aug 2023
- credit Unknown
Introduced: 31 Aug 2023
CVE-2023-39135 Open this link in a new tabHow to fix?
There is no fixed version for marmelroy/Zip.
Overview
Affected versions of this package are vulnerable to Arbitrary File Write via Archive Extraction (Zip Slip) due to improper input sanitization in the unzipFile function which allows an attacker to exploit this vulnerability by using a crafted zip file.
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