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CVE-2023-41039

Sandbox escape via various forms of "format" in RestrictedPython

Published: Aug 30, 2023Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-74
NVD MITRE
8.3CVSSHIGH
EPSS Score
0.6%
Top 54.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:RS:CC:HI:HA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:LAvailability
Low
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Weaknesses

CWE-74

Affected Products

restrictedpythonzope
On-prem
OSS Libraries / web-framework
RestrictedPythonzopefoundation
Mixed
Web & CMS Plugins / cms-core
RestrictedPythonPyPIOSS Libraries
zopeoss-projectOSS Librariesaka zodb, accesscontrol, zope
zopefoundationoss-projectWeb & CMS Pluginsaka zope, restrictedpython, accesscontrol
pypipackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/zopefoundation/RestrictedPython/commit/4134aedcff17c977da7717693ed89ce56d54c120
github.com
https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-xjw2-6jm9-rf67
github.com
https://nvd.nist.gov/vuln/detail/CVE-2023-41039
nvd.nist.gov
and 1 more references View all →

Timeline

Published
Aug 30, 2023
Last Updated
Nov 21, 2024

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