CVE-2021-32811 Remote Code Execution via Script (Python) objects under Python 3

2021-08-0221:55:11

CWE-915

GitHub_M

www.cve.org

zope

python 3

remote code execution

security issue

products.pythonscripts

web application server

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.009

Percentile

82.9%

JSON

Zope is an open-source web application server. Zope versions prior to versions 4.6.3 and 5.3 have a remote code execution security issue. In order to be affected, one must use Python 3 for one’s Zope deployment, run Zope 4 below version 4.6.3 or Zope 5 below version 5.3, and have the optional Products.PythonScripts add-on package installed. By default, one must have the admin-level Zope “Manager” role to add or edit Script (Python) objects through the web. Only sites that allow untrusted users to add/edit these scripts through the web are at risk. Zope releases 4.6.3 and 5.3 are not vulnerable. As a workaround, a site administrator can restrict adding/editing Script (Python) objects through the web using the standard Zope user/role permission mechanisms. Untrusted users should not be assigned the Zope Manager role and adding/editing these scripts through the web should be restricted to trusted users only. This is the default configuration in Zope.

CNA Affected

[
  {
    "product": "Zope",
    "vendor": "zopefoundation",
    "versions": [
      {
        "status": "affected",
        "version": ">= 4.0, < 4.6.3"
      },
      {
        "status": "affected",
        "version": ">= 5.0, < 5.3"
      }
    ]
  }
]