expat: large number of colons in input makes parser consume high amount of resources, leading to DoS (CVE-2018-20843)
In libexpat in Expat before 2.2.7, XML input including XML names that
contain a large number of colons could make the XML
parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).
Fixed In Version:
(from redmine: issue id 10629, created on 2019-06-28, closed on 2019-07-02)