CVE-2023-6507

2023-12-0819:15:08

CWE-269

[email protected]

web.nvd.nist.gov

cpython

subprocess module

posix platforms

cve-2023-6507

security issue

privilege escalation

nvd

6.1 Medium

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

5 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

25.6%

JSON

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).

Affected configurations

NVD

Node

pythonpythonMatch3.12.0-

pythonpythonMatch3.13.0alpha1

pythonpythonMatch3.13.0alpha2

CPENameOperatorVersion
python:pythonpythoneq3.12.0
python:pythonpythoneq3.13.0

CPE	Name	Operator	Version
python:python	python	eq	3.12.0
python:python	python	eq	3.13.0

CNA Affected

[
  {
    "defaultStatus": "unaffected",
    "platforms": [
      "POSIX"
    ],
    "product": "CPython",
    "repo": "https://github.com/python/cpython",
    "vendor": "Python Software Foundation",
    "versions": [
      {
        "lessThan": "3.12.1",
        "status": "affected",
        "version": "3.12.0",
        "versionType": "python"
      },
      {
        "lessThan": "3.13.0a3",
        "status": "affected",
        "version": "3.13.0a1",
        "versionType": "python"
      }
    ]
  }
]