Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix: * python: DOS via regular expression backtracking in difflib.IS_LINE_JUNK method in difflib * python: DOS via regular expression catastrophic backtracking in apop method in pop3lib For more details about the security issue, including the impact, a CVSS score, and other related information, refer to the CVE page listed in the References section. Red Hat would like to thank the Python security response team for reporting these issues. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.6 Release Notes linked from the References section.