GHSA-8823-XPHR-QW9V Gentoo Portage does not verify X.509 certificates from SSL servers

The urlopen function in pym/portage/util/urlopen.py in Gentoo Portage 2.1.12, when using HTTPS, does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and modify binary package lists via a crafted certificate...