Arbitrary Code Execution Affecting restrictedpython package, versions [,5.3)[6.0a1.dev0,6.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PYTHON-RESTRICTEDPYTHON-5769699
- published11 Jul 2023
- disclosed10 Jul 2023
- creditdespawningbone
Introduced: 10 Jul 2023
CVE-2023-37271 (opens in a new tab)How to fix?
Upgrade RestrictedPython to version 5.3, 6.1 or higher.
Overview
RestrictedPython is a RestrictedPython is a defined subset of the Python language which allows to provide a program input into a trusted environment.
Affected versions of this package are vulnerable to Arbitrary Code Execution via stack frame sandbox escape due to not checking access to stack frames and their attributes. Stack frames are accessible within at least generators and generator expressions, which are allowed inside RestrictedPython. 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 scope and allowing the call of unrestricted Python code, therefore potentially allowing arbitrary code execution in the Python interpreter.
Note:
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.