python38:3.8 and python38-devel:3.8 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-psutil: Double free because of refcount mishandling (CVE-2019-18874)
python-jinja2: ReDoS vulnerability in the urlize filter (CVE-2020-28493)
python: Information disclosure via pydoc (CVE-2021-3426)
python-babel: Relative path traversal allows attacker to load arbitrary
locale files and execute arbitrary code (CVE-2021-20095, CVE-2021-42771)
python: Web cache poisoning via urllib.parse.parse_qsl and
urllib.parse.parse_qs by using a semicolon in query parameters (CVE-2021-23336)
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)

Bug Fix(es):
- CVE-2019-18874 python-psutil: Double free because of refcount mishandling
- CVE-2020-28493 python-jinja2: ReDoS vulnerability in the urlize filter
- CVE-2021-23336 python: Web cache poisoning via urllib.parse.parse_qsl and
urllib.parse.parse_qs by using a semicolon in query parameters
- CVE-2021-3426 python: Information disclosure via pydoc
- CVE-2021-28957 python-lxml: Missing input sanitization for formaction
HTML5 attributes may lead to XSS
- CVE-2021-20095 CVE-2021-42771 python-babel: Relative path traversal allows
attacker to load arbitrary locale files and execute arbitrary code
- CVE-2021-29921 python-ipaddress: Improper input validation of octal
strings
- CVE-2021-3572 python-pip: Incorrect handling of unicode separators in git
references
- CVE-2021-33503 python-urllib3: ReDoS in the parsing of authority part of
URL

CVE(s):
CVE-2019-18874
psutil (aka python-psutil) through 5.6.5 can have a double free. This occurs because of refcount mishandling within a while or for loop that converts system data into a Python object.
CVE-2020-28493
This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the `_punctuation_re regex` operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.
CVE-2021-20095
** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by its CNA. Notes: none.
CVE-2021-23336
The package python/cpython from 0 and before 3.6.13, from 3.7.0 and before 3.7.10, from 3.8.0 and before 3.8.8, from 3.9.0 and before 3.9.2 are vulnerable to Web Cache Poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter.
CVE-2021-28957
An XSS vulnerability was discovered in python-lxml's clean module versions before 4.6.3. When disabling the safe_attrs_only and forms arguments, the Cleaner class does not remove the formaction attribute allowing for JS to bypass the sanitizer. A remote attacker could exploit this flaw to run arbitrary JS code on users who interact with incorrectly sanitized HTML. This issue is patched in lxml 4.6.3.
CVE-2021-29921
In Python before 3,9,5, the ipaddress library mishandles leading zero characters in the octets of an IP address string. This (in some situations) allows attackers to bypass access control that is based on IP addresses.
CVE-2021-33503
An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.
CVE-2021-3426
There's a flaw in Python 3's pydoc. A local or adjacent attacker who discovers or is able to convince another local or adjacent user to start a pydoc server could access the server and use it to disclose sensitive information belonging to the other user that they would not normally be able to access. The highest risk of this flaw is to data confidentiality. This flaw affects Python versions before 3.8.9, Python versions before 3.9.3 and Python versions before 3.10.0a7.
CVE-2021-3572
A flaw was found in python-pip in the way it handled Unicode separators in git references. A remote attacker could possibly use this issue to install a different revision on a repository. The highest threat from this vulnerability is to data integrity. This is fixed in python-pip version 21.1.
CVE-2021-42771
Babel.Locale in Babel before 2.9.1 allows attackers to load arbitrary locale .dat files (containing serialized Python objects) via directory traversal, leading to code execution.

Modularity name: python38
Stream name: 3.8