RestrictedPython vulnerable to arbitrary code execution via stack frame sandbox escape

RestrictedPython is a tool that helps to define a subset of the Python language which allows users to provide a program input into a trusted environment. RestrictedPython does not check access to stack frames and their attributes. Stack frames are accessible within at least generators and generator expressions, which are allowed inside RestrictedPython. Prior to versions 6.1 and 5.3, an attacker with access to a RestrictedPython environment can write code that gets the current stack frame in a generator and then walk the stack all the way beyond the RestrictedPython invocation boundary, thus breaking out of the restricted sandbox and potentially allowing arbitrary code execution in the Python interpreter. All RestrictedPython deployments that allow untrusted users to write Python code in the RestrictedPython environment are at risk. In terms of Zope and Plone, this would mean deployments where the administrator allows untrusted users to create and/or edit objects of type `Script (Python)`, `DTML Method`, `DTML Document` or `Zope Page Template`. This is a non-default configuration and likely to be extremely rare. The problem has been fixed in versions 6.1 and 5.3.

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

动态管理代码资源的控制不恰当

RestrictedPython 安全漏洞

RestrictedPython是一个帮助定义 Python 语言子集的工具，该子集允许将程序输入提供到受信任的环境中。 RestrictedPython 5.3之前版本、6.1之前版本存在安全漏洞，该漏洞源于允许用户向受信任的环境提供程序输入，但 RestrictedPython 不检查对堆栈帧及其属性的访问，攻击者利用该漏洞可以在Python解释器中执行任意代码。

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