VULNERABILITY INTELLIGENCE
CVE-2021-3177
CVSS score9.8 CRITICAL
EPSS probability24.00%
CISA KEVNot currently listed
Published2021-01-19
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
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.
Weakness classification
- nvd@nist.gov: CWE-120
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-120
Primary references
- cve@mitre.org — Exploit, Issue Tracking, Patch, Vendor Advisory
- cve@mitre.org — Patch, Third Party Advisory
- cve@mitre.org
- cve@mitre.org — Mailing List, Third Party Advisory
- cve@mitre.org — Mailing List, Third Party Advisory
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org