Vulnerability · NVD

CVE-2021-3177

CRITICAL 9.8 Vendor bulletin scale — NVD CVSS pending Published on 2021-01-19

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.

Attack vector : Network No privileges required No user interaction

Show raw CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS 23.29% moderate exploit risk percentile 97.6%

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Python 3.12 Windows winget:Python.Python.3.12

Affected ≥3.9.0 ≤3.9.1 Fixed in > 3.9.1 Latest tracked 3.12.10 patched

NVD references 10 distinct products for this CVE — only those tracked by Scout (mobile and desktop catalog apps) are listed above. Libraries, servers and out-of-scope products do not appear here. Full list on NVD ↗

Vulnerable CPE configurations (4)

Vendor	Product	Platform	Versions	CPE 2.3 URI
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.6.0 ≤3.6.12	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.7.0 ≤3.7.9	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.8.0 ≤3.8.7	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.9.0 ≤3.9.1	cpe:2.3:a:python:python::::::::

View on NVD ↗ Advisory · bugs.python.org Advisory · github.com Advisory · python-security.readthedocs.io