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CVE-2023-41050— Information disclosure through Python's "format" functionality in Zope AccessControl

Quick assessment

Affected
zopefoundation AccessControl
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.

Zope AccessControl是Zope基金会的Zope中使用的通用安全框架。 Zope AccessControl 存在信息泄露漏洞，该漏洞源于允许控制格式字符串的人通过属性访问和可访问对象的订阅来读取可访问（递归）的对象。

CVSS 6.8 · Medium EPSS 0.64% · P49
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I. Basic Information for CVE-2023-41050

Vulnerability Information
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Vulnerability Title
Information disclosure through Python's "format" functionality in Zope AccessControl
Source: CVE Program / CVE List V5
Vulnerability Description
AccessControl provides a general security framework for use in Zope. Python's "format" functionality allows someone controlling the format string to "read" objects accessible (recursively) via attribute access and subscription from accessible objects. Those attribute accesses and subscriptions use Python's full blown `getattr` and `getitem`, not the policy restricted `AccessControl` variants `_getattr_` and `_getitem_`. This can lead to critical information disclosure. `AccessControl` already provides a safe variant for `str.format` and denies access to `string.Formatter`. However, `str.format_map` is still unsafe. Affected are all users who allow untrusted users to create `AccessControl` controlled Python code and execute it. A fix has been introduced in versions 4.4, 5.8 and 6.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Zope AccessControl 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zope AccessControl是Zope基金会的Zope中使用的通用安全框架。 Zope AccessControl 存在信息泄露漏洞，该漏洞源于允许控制格式字符串的人通过属性访问和可访问对象的订阅来读取可访问（递归）的对象。
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
zopefoundation AccessControl AccessControl: < 4.4 -

II. Public POCs for CVE-2023-41050

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III. Intelligence Information for CVE-2023-41050

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Patches & Fixes for CVE-2023-41050 (1)

Vendor Advisories for CVE-2023-41050 (1)

IV. Related Vulnerabilities

Same product: AccessControl
Same vendor: zopefoundation
Same weakness: CWE-200

V. Comments for CVE-2023-41050

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