Portage is the package management and distribution system for Gentoo.
A vulnerability was discovered in emerge-delta-webrsync and Portage that did not properly validate the revocation status of GPG keys.
A remote attacker could conduct a man-in-the-middle attack. Please review the referenced bug for specific details.
There is no known workaround at this time.
All emerge-delta-webrsync users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose
">=app-portage/emerge-delta-webrsync-3.7.4"
All Portage users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-apps/portage-2.3.22"