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CVE-2025-22153

try/except* clauses could allow bypass RestrictedPython via type confusion bug in the CPython interpreter

Published: Jan 23, 2025Updated: Jan 23, 2025 Sources: CVE List NVD GHSACWE-843
NVD MITRE
7.9CVSSHIGH
EPSS Score
0.4%
Top 69.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

RestrictedPython is a tool that helps to define a subset of the Python language which allows to provide a program input into a trusted environment. Via a type confusion bug in versions of the CPython interpreter starting in 3.11 and prior to 3.13.2 when using `try/except*`, RestrictedPython starting in version 6.0 and prior to version 8.0 could be bypassed. The issue is patched in version 8.0 of RestrictedPython by removing support for `try/except*` clauses. No known workarounds are available.

CVSS Vector Breakdown

AV:NAC:HPR:HUI:NS:CC:HI:HA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-843

Affected Products

RestrictedPythonPyPIOSS Libraries
RestrictedPythonzopefoundation
Mixed
Web & CMS Plugins / cms-core
pypipackage-ecosystemOSS Libraries
zopefoundationoss-projectWeb & CMS Pluginsaka zope, restrictedpython, accesscontrol

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://github.com/zopefoundation/RestrictedPython/commit/48a92c5bb617a647cffd0dadd4d5cfe626bcdb2f
github.com
https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-gmj9-h825-chq2
github.com
https://nvd.nist.gov/vuln/detail/CVE-2025-22153
nvd.nist.gov
and 1 more references View all →

Timeline

Published
Jan 23, 2025
Last Updated
Jan 23, 2025

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