restrictedpython: CVE-2023-37271

Debian Bug report logs - #1041429
restrictedpython: CVE-2023-37271

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Moritz Mühlenhoff <jmm@inutil.org>

To: submit@bugs.debian.org

Subject: restrictedpython: CVE-2023-37271

Date: Tue, 18 Jul 2023 20:50:12 +0200

Source: restrictedpython
X-Debbugs-CC: team@security.debian.org
Severity: grave
Tags: security

Hi,

The following vulnerability was published for restrictedpython.

CVE-2023-37271[0]:
| 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.

https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-wqc8-x2pr-7jqh
https://github.com/zopefoundation/RestrictedPython/commit/c8eca66ae49081f0016d2e1f094c3d72095ef531 (master)
https://github.com/zopefoundation/RestrictedPython/commit/d8c5aa72c5d0ec8eceab635d93d6bc8321116002 (5.3)
   

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2023-37271
    https://www.cve.org/CVERecord?id=CVE-2023-37271

Please adjust the affected versions in the BTS as needed.

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