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CVE-2023-6507— Groups not dropped before running subprocess when using empty 'extra_groups' parameter

Quick assessment

Affected
Python Software Foundation CPython
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Python是Python基金会的一套开源的、面向对象的程序设计语言。该语言具有可扩展、支持模块和包、支持多种平台等特点。 Python 3.12.0版本存在安全漏洞，该漏洞源于使用空的extra_groups参数时，在运行子进程之前不会删除原始进程的组。

CVSS 6.1 · Medium EPSS 1.34% · P70

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 2

VendorProduct Version RangeStatus
Python Software Foundation CPython < 3.12.1 affected
3.13.0a1< 3.13.0a3 affected
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I. Basic Information for CVE-2023-6507

Vulnerability Information
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Vulnerability Title
Groups not dropped before running subprocess when using empty 'extra_groups' parameter
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was found in CPython 3.12.0 `subprocess` module on POSIX platforms. The issue was fixed in CPython 3.12.1 and does not affect other stable releases. When using the `extra_groups=` parameter with an empty list as a value (ie `extra_groups=[]`) the logic regressed to not call `setgroups(0, NULL)` before calling `exec()`, thus not dropping the original processes' groups before starting the new process. There is no issue when the parameter isn't used or when any value is used besides an empty list. This issue only impacts CPython processes run with sufficient privilege to make the `setgroups` system call (typically `root`).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Python 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Python是Python基金会的一套开源的、面向对象的程序设计语言。该语言具有可扩展、支持模块和包、支持多种平台等特点。 Python 3.12.0版本存在安全漏洞，该漏洞源于使用空的extra_groups参数时，在运行子进程之前不会删除原始进程的组。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Python Software Foundation CPython 0 ~ 3.12.1 -

II. Public POCs for CVE-2023-6507

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III. Intelligence Information for CVE-2023-6507

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Patches & Fixes for CVE-2023-6507 (4)

Other References for CVE-2023-6507 (2)

IV. Related Vulnerabilities

Same product: CPython
Same vendor: Python Software Foundation
Same weakness: CWE-269

V. Comments for CVE-2023-6507

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