Affected: AlmaLinux:8: python39-Cython, AlmaLinux:8: python39-PyMySQL, AlmaLinux:8: python39-attrs, AlmaLinux:8: python39-cffi, AlmaLinux:8: python39-chardet, AlmaLinux:8: python39-cryptography, AlmaLinux:8: python39-idna, AlmaLinux:8: python39-iniconfig, AlmaLinux:8: python39-mod_wsgi, AlmaLinux:8: python39-more-itertools and 26 more

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 AlmaLinux Release Notes linked from the References section.

Affected: Bitnami: libpython

There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.

There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.

There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.

expat 2.1.0 and earlier does not properly handle entities expansion unless an application developer uses the XML_SetEntityDeclHandler function, which allows remote attackers to cause a denial of service (resource consumption), send HTTP requests to intranet servers, or read arbitrary files via a crafted XML document, aka an XML External Entity (XXE) issue. NOTE: it could be argued that because expat already provides the ability to disable external entity expansion, the responsibility for resolving this issue lies with application developers; according to this argument, this entry should be REJECTed, and each affected application would need its own CVE. shadow: TOCTOU (time-of-check time-of-use) race condition when copying and removing directory trees run-mailcap in the Debian mime-support package before 3.52-1+deb7u1 allows context-dependent attackers to execute arbitrary commands via shell metacharacters in a filename. In Python (aka CPython) up to 3.10.8, the mailcap module does not add escape characters into commands discovered in the system mailcap file. This may allow attackers to inject shell commands into applications that call mailcap.findmatch with untrusted input (if they lack validation of user-provided filenames or arguments). The fix is also back-ported to 3.7, 3.8, 3.9 Use-after-free vulnerability in bzip2recover in bzip2 1.0.6 allows remote attackers to cause a denial of service (crash) via a crafted bzip2 file, related to block ends set to before the start o…

Affected: openEuler:20.03-LTS-SP1: python3, openEuler:20.03-LTS-SP2: python3

Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces. Security Fix(es): A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.(CVE-2021-3737)

There s a flaw in urllib s AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.(CVE-2021-3733)

Security update for python

python-cryptography: Bleichenbacher timing oracle attack against RSA decryption python: Unsafe use of eval() on data retrieved via HTTP in the test suite python-lxml: mXSS due to the use of improper parser python-jinja2: ReDoS vulnerability in the urlize filter python-cryptography: Large inputs for symmetric encryption can trigger integer overflow leading to buffer overflow python: Stack-based buffer overflow in PyCArg_repr in _ctypes/callproc.c python: Information disclosure via pydoc python-pip: Incorrect handling of unicode separators in git references python: urllib: Regular expression DoS in AbstractBasicAuthHandler python: ftplib should not use the host from the PASV response python-babel: Relative path traversal allows attacker to load arbitrary locale files and execute arbitrary code python: Web cache poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a semicolon in query parameters python-lxml: Missing input sanitization for formaction HTML5 attributes may lead to XSS python-ipaddress: Improper input validation of octal strings python-urllib3: ReDoS in the parsing of authority part of URL python-babel: Relative path traversal allows attacker to load arbitrary locale files and execute arbitrary code python: urllib.parse does not sanitize URLs containing ASCII newline and tabs

Security update for python3

Affected: Ubuntu:Pro:14.04:LTS: python3.4, Ubuntu:Pro:14.04:LTS: python3.5, Ubuntu:Pro:16.04:LTS: python3.5, Ubuntu:18.04:LTS: python3.6, Ubuntu:18.04:LTS: python3.7, Ubuntu:18.04:LTS: python3.8, Ubuntu:20.04:LTS: python3.8, Ubuntu:20.04:LTS: python3.9

There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Python ausnutzen, um einen Denial of Service Angriff durchzuführen.