Arbitrary Code Execution Affecting bundler package, versions <2.2.33
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Test your applications- Snyk ID SNYK-RUBY-BUNDLER-2313646
- published 9 Dec 2021
- disclosed 9 Dec 2021
- credit Unknown
Introduced: 9 Dec 2021
CVE-2021-43809 Open this link in a new tabHow to fix?
Upgrade bundler to version 2.2.33 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Execution via a Gemfile that includes gem entries that use the git option with invalid values with a leading dash.
The attacker has to craft a directory containing a Gemfile file that declares a dependency that is located in a Git repository. This dependency has to have a Git URL in the form of -u./payload. This URL will be used to construct a git clone command but will be interpreted as the upload-pack argument. Then this directory needs to be shared with the victim, who then needs to run a command that evaluates the Gemfile, such as bundle lock.