Affected versions of closure-util insecurely download an executable over an unencrypted HTTP connection.
In scenarios where an attacker has a privileged network position, it is possible to intercept the response and replace the executable with a malicious one, resulting in code execution on the system running closure-util.
To mitigate this issue:
1. Install the package using npm's --ignore-scripts flag.
2. Navigate to the package directory, and open default-config.json in a text editor
3. Change the download URLs in the compiler_url and library_url to https equivalents
4. run npm i in the package directory.
{
"github_reviewed_at": "2020-06-16T20:52:08Z",
"github_reviewed": true,
"severity": "HIGH",
"nvd_published_at": null,
"cwe_ids": [
"CWE-311"
]
}