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Vulnerability of Python plistlib: overload via Apple Property List

Synthesis of the vulnerability 

An attacker can trigger an overload via Apple Property List of Python plistlib, in order to trigger a denial of service.
Vulnerable systems: Python.
Severity of this threat: 2/4.
Creation date: 03/11/2020.
Références of this weakness: 42103, VIGILANCE-VUL-33776.

Description of the vulnerability 

An attacker can trigger an overload via Apple Property List of Python plistlib, in order to trigger a denial of service.
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This weakness alert impacts software or systems such as Python.

Our Vigil@nce team determined that the severity of this computer vulnerability note is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this security bulletin.

Solutions for this threat 

Python: version 3.9.1.
The version 3.9.1 is fixed:
  https://www.python.org/downloads/release/python-391/

Python: version 3.8.7.
The version 3.8.7 is fixed:
  https://www.python.org/downloads/release/python-391/

Python: version 3.6.13.
The version 3.6.13 is fixed:
  https://www.python.org/downloads/

Python: version 3.7.10.
The version 3.7.10 is fixed:
  https://www.python.org/downloads/

Python plistlib: patch for Apple Property List.
A patch is available:
  https://hg.python.org/lookup/34637a0ce21e7261b952fbd9d006474cc29b681f
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