(RHSA-2021:4160) Moderate: python39:3.9 and python39-devel:3.9 security update

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(es):

• python: Information disclosure via pydoc (CVE-2021-3426)

• python: urllib: Regular expression DoS in AbstractBasicAuthHandler (CVE-2021-3733)

• python-lxml: Missing input sanitization for formaction HTML5 attributes may lead to XSS (CVE-2021-28957)

• python-ipaddress: Improper input validation of octal strings (CVE-2021-29921)

• python-urllib3: ReDoS in the parsing of authority part of URL (CVE-2021-33503)

• python-pip: Incorrect handling of unicode separators in git references (CVE-2021-3572)

• python: urllib: HTTP client possible infinite loop on a 100 Continue response (CVE-2021-3737)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.