A potential denial of service (DoS) vulnerability was discovered in
python-ipaddress, a backport of Python 3’s
ipaddress module for creating
and manipulating IPv4 and IPv6 internet addresses (eg.
This was caused by improperly computing hash values in the
IPv6Interface classes: if an application was affected by the performance of a
IPv6Interface objects, an attacker
could have caused many dictionary entries to be created.