There's a flaw in urllib's AbstractBasicAuthHandler class.

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• fedoraproject extra packages for enterprise linux7.0
• fedoraproject fedora33
• fedoraproject fedora34
• fedoraproject fedora35
• fedoraproject fedora36
• netapp hci compute node firmwareall versions
• netapp management services for element software and netapp hciall versions
• netapp ontap select deploy administration utilityall versions
• netapp solidfire, enterprise sds & hci storage nodeall versions
• python pythonbefore 3.6.14
• python python3.7.0 and later · before 3.7.11
• python python3.8.0 and later · before 3.8.10
• python python3.9.0 and later · before 3.9.5
• python python3.10.0
• redhat codeready linux builder8.0
• redhat codeready linux builder for ibm z systems8.0
• redhat codeready linux builder for power little endian8.0
• redhat enterprise linux8.0
• redhat enterprise linux eus8.4
• redhat enterprise linux for ibm z systems8.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

• n/a python

  • Fixed in python v3.6.14, python v3.7.11, python v3.8.10, python v3.9.5.affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2016-5636Integer overflow in the get_data function in zipimport.c in CPython (aka Python) before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 all
  47Plan
• CVE-2007-4559Directory traversal vulnerability in the (1) extract and (2) extractall functions in the tarfile module in Python allows user-assisted remot
  47Plan
• CVE-2021-3177Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Pyth
  46Plan
• CVE-2014-4650The CGIHTTPServer module in Python 2.7.5 and 3.3.4 does not properly handle URLs in which URL encoding is used for path separators, which al
  46Plan
• CVE-2018-1000802Python Software Foundation Python (CPython) version 2.7 contains a CWE-77: Improper Neutralization of Special Elements used in a Command ('C
  45Plan
• CVE-2020-27619In Python 3 through 3.9.0, the Lib/test/multibytecodec_support.py CJK codec tests call eval() on content retrieved via HTTP.
  42Plan

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1function expand(node) {2  return node.children.map(expand);3}

1const MAX_DEPTH = 32;2function expand(node, depth = 0) {3  if (depth > MAX_DEPTH) throw new Error("too deep");4  return node.children.map((c) => expand(c, depth + 1));5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.