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CVE-2023-41039

8.3 · HIGH

RestrictedPython is a restricted execution environment for Python to run untrusted code.

Published Aug 30, 2023CWE-74EPSS 0.68%

Overview

CVE-2023-41039 is a high-severity vulnerability. It was published on August 30, 2023 and has a CVSS 3.1 base score of 8.3 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.3, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

RestrictedPython is a restricted execution environment for Python to run untrusted code. Python's "format" functionality allows someone controlling the format string to "read" all objects accessible through recursive attribute lookup and subscription from objects he can access. This can lead to critical information disclosure. With `RestrictedPython`, the format functionality is available via the `format` and `format_map` methods of `str` (and `unicode`) (accessed either via the class or its instances) and via `string.Formatter`. All known versions of `RestrictedPython` are vulnerable. This issue has been addressed in commit `4134aedcff1` which has been included in the 5.4 and 6.2 releases. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/zopefoundation/RestrictedPython/commit/4134aedcff17c977da7717693ed89ce56d54c120GitHubgithub.com/zopefoundation/RestrictedPython/security/advisories/GHSA-xjw2-6jm9-rf67GitHubgithub.com/zopefoundation/RestrictedPython/commit/4134aedcff17c977da7717693ed89ce56d54c120GitHubgithub.com/zopefoundation/RestrictedPython/security/advisories/GHSA-xjw2-6jm9-rf67

How CyberStrike helps

Frequently asked questions

What is CVE-2023-41039?

CVE-2023-41039 is a high-severity vulnerability. It was published on August 30, 2023 and has a CVSS 3.1 base score of 8.3 (HIGH).

How severe is CVE-2023-41039?

This vulnerability has a CVSS 3.1 base score of 8.3, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-41039?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-41039?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-41039 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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