Buffer Overflow Affecting python3.8 package, versions <3.8.5-1~20.04.2


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
2.51% (90th percentile)

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  • Snyk IDSNYK-UBUNTU2004-PYTHON38-1065935
  • published29 Jan 2021
  • disclosed19 Jan 2021

Introduced: 19 Jan 2021

CVE-2021-3177  (opens in a new tab)
CWE-120  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 python3.8 to version 3.8.5-1~20.04.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3.8 package and not the python3.8 package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

Python 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 Python applications that accept floating-point numbers as untrusted input, as demonstrated by a 1e300 argument to c_double.from_param. This occurs because sprintf is used unsafely.

References

CVSS Scores

version 3.1