CVE-2023-41039

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.

How to fix CVE-2023-41039

To remediate CVE-2023-41039, upgrade the affected package to a fixed version below.

• —no fix listed
• —upgrade to 5.4 or later
• —upgrade to 4134aedcff17c977da7717693ed89ce56d54c120 or later

Is CVE-2023-41039 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (3)

• from 0
• from 0, < 5.4
• from 0, < 4134aedcff17c977da7717693ed89ce56d54c120 | >= 6.0, < 6.2, from 0, < 5.4

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2023-41039
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2023-41039
• PATCHgithub.com/zopefoundation/RestrictedPython
• WEBgithub.com/zopefoundation/RestrictedPython/commit/4134aedcff17c977da7717693ed89ce56d54c120