PT-2023-9621 · Python+3 · Cpython+3

Seth Larson · Published 2023-12-08 · Updated 2025-08-11 · CVE-2023-6507

Positive Technologies (AI Summary)

CVSS v2.0

7.1

High

Base vector

AV:A/AC:L/Au:S/C:C/I:C/A:N

Name of the Vulnerable Software and Affected Versions CPython version 3.12.0

Description The issue is related to errors in privilege management in the subprocess module of the CPython interpreter. When using the extra groups= parameter with an empty list as a value, the logic regressed to not call setgroups(0, NULL) before calling exec(), thus not dropping the original processes' groups before starting the new process. This issue only impacts CPython processes run with sufficient privilege to make the setgroups system call, typically root.

Recommendations For CPython version 3.12.0, update to CPython 3.12.1 to resolve the issue. As a temporary workaround, consider avoiding the use of the extra groups= parameter with an empty list until a patch is available. Restrict access to the subprocess module to minimize the risk of exploitation.

Exploit

Fix

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

ALT-PU-2024-1300

AZL-35143

BDU:2024-08865

BIT-LIBPYTHON-2023-6507

BIT-PYTHON-2023-6507

BIT-PYTHON-MIN-2023-6507

CVE-2023-6507

OPENSUSE-SU-2024:13511-1

PSF-2023-12

USN-6891-1

Affected Products

Alt Linux

Cpython

Linuxmint

Ubuntu

References · 68

• 🔥 https://github.com/Einstein2150/CVE-2022-48565-POC · Exploit
• https://github.com/python/cpython/commit/10e9bb13b8dcaa414645b9bd10718d8f7179e82b · Patch
• https://github.com/python/cpython/issues/112334 · Patch
• https://github.com/python/cpython/commit/9fe7655c6ce0b8e9adc229daf681b6d30e6b1610 · Patch
• https://github.com/python/cpython/commit/85bbfa8a4bbdbb61a3a84fbd7cb29a4096ab8a06 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-6507 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-48565 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3426 · Vendor Advisory
• https://osv.dev/vulnerability/USN-6891-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-6507 · Security Note
• https://osv.dev/vulnerability/PSF-CVE-2023-6507 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-16935 · Vendor Advisory
• https://osv.dev/vulnerability/PSF-2023-12 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-14647 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-48564 · Vendor Advisory