Arbitrary Code Execution Affecting bundler Open this link in a new tab package, versions <2.2.33
Attack Complexity
High
User Interaction
Required
Confidentiality
High
Integrity
High
Availability
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-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
.