Information disclosure through Python's "format" functionality in Zope AccessControl

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.

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

信息暴露

Zope AccessControl 信息泄露漏洞

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。

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