Arbitrary File Write via Archive Extraction (Zip Slip) Affecting github.com/cockroachdb/cockroach/pkg/workload/querylog package, versions <19.2.0-beta.20190930


0.0
low

Snyk CVSS

    Attack Complexity High

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-GOLANG-GITHUBCOMCOCKROACHDBCOCKROACHPKGWORKLOADQUERYLOG-472940
  • published 11 Oct 2019
  • disclosed 10 Sep 2019
  • credit Semmle Security Research

How to fix?

Upgrade github.com/cockroachdb/cockroach/pkg/workload/querylog to version 19.2.0-beta.20190930 or higher.

Overview

github.com/cockroachdb/cockroach/pkg/workload/querylog is a package part of CockroachDB - the open source, cloud-native SQL database.

Affected versions of this package are vulnerable to Arbitrary File Write via Archive Extraction (Zip Slip). Files within a zip file can break out of the target directory when being extracted.

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