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Buffer Overflow Affecting python3 package, versions <3.8.2-r2

0.0
critical

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 4.04% (92nd percentile)
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NVD
9.8 critical
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SUSE
5.9 medium
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Red Hat
5.9 medium

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  • Snyk ID SNYK-ALPINE311-PYTHON3-1077671
  • published 20 Feb 2021
  • disclosed 19 Jan 2021
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Introduced: 19 Jan 2021

CVE-2021-3177 Open this link in a new tab
CWE-120 Open this link in a new tab

How to fix?

Upgrade Alpine:3.11 python3 to version 3.8.2-r2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3 package and not the python3 package as distributed by Alpine. See How to fix? for Alpine:3.11 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