easy_install in setuptools before 0.7 uses HTTP to retrieve packages from the PyPI repository, and does not perform integrity checks on package contents, which allows man-in-the-middle attackers to execute arbitrary code via a crafted response to the default use of the product.
{ "nvd_published_at": "2013-08-06T02:52:00Z", "cwe_ids": [ "CWE-319" ], "severity": "HIGH", "github_reviewed": true, "github_reviewed_at": "2023-08-29T18:46:57Z" }