Shadow is a set of tools to deal with user accounts.
A local attacker could possibly bypass security restrictions if an administrator used “group blacklisting” to restrict access to file system paths.
A local attacker could possibly bypass security restrictions.
There is no known workaround at this time.
All shadow users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-apps/shadow-4.6"