CVE-2023-41039

Sandbox escape via various forms of "format" in RestrictedPython

Severity Score

7.7

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

Low

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-08-22 CVE Reserved
2023-08-30 CVE Published
2024-08-02 CVE Updated
2024-09-05 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://github.com/zopefoundation/RestrictedPython/commit/4134aedcff17c977da7717693ed89ce56d54c120	2023-09-05

URL	Date	SRC
https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-xjw2-6jm9-rf67	2023-09-05

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Zope Search vendor "Zope"		Restrictedpython Search vendor "Zope" for product "Restrictedpython"				< 5.4 Search vendor "Zope" for product "Restrictedpython" and version " < 5.4"		-		Affected
Zope Search vendor "Zope"		Restrictedpython Search vendor "Zope" for product "Restrictedpython"				>= 6.0 < 6.2 Search vendor "Zope" for product "Restrictedpython" and version " >= 6.0 < 6.2"		-		Affected