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CVE-2023-41050

MEDIUM
Published 2023-09-06T17:58:10.510Z
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CVSS Score

V3.1
6.8
/10
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.002
probability
of exploitation in the wild

There is a 0.2% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.464
Higher than 46.4% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
NONE
Availability
NONE

Description

AccessControl provides a general security framework for use in Zope. Python's "format" functionality allows someone controlling the format string to "read" objects accessible (recursively) via attribute access and subscription from accessible objects. Those attribute accesses and subscriptions use Python's full blown `getattr` and `getitem`, not the policy restricted `AccessControl` variants `_getattr_` and `_getitem_`. This can lead to critical information disclosure. `AccessControl` already provides a safe variant for `str.format` and denies access to `string.Formatter`. However, `str.format_map` is still unsafe. Affected are all users who allow untrusted users to create `AccessControl` controlled Python code and execute it. A fix has been introduced in versions 4.4, 5.8 and 6.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

zopefoundation

AccessControl

Affected Versions:

AccessControl: < 4.4 AccessControl: >= 5.0, < 5.8 AccessControl: >= 6.0, < 6.2 Zope: < 4.8.9 Zope: >= 5.0.0, < 5.8.4

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

Information disclosure in AccessControl

GHSA-8xv7-89vj-q48c

Advisory Details

### Impact Python's "format" functionality allows someone controlling the format string to "read" objects accessible (recursively) via attribute access and subscription from accessible objects. Those attribute accesses and subscriptions use Python's full blown `getattr` and `getitem`, not the policy restricted `AccessControl` variants `_getattr_` and `_getitem_`. This can lead to critical information disclosure. `AccessControl` already provides a safe variant for `str.format` and denies access to `string.Formatter`. However, `str.format_map` is still unsafe. Affected are all users who allow untrusted users to create `AccessControl` controlled Python code and execute it. ### Patches A fix will be introduced in the versions 4.4, 5.8 and 6.2. ### Workarounds There are no workarounds. ### References https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-xjw2-6jm9-rf67 describes the corresponding problem for `RestrictedPython`.

Affected Packages

PyPI AccessControl
ECOSYSTEM: ≥0 <4.4
PyPI Zope
ECOSYSTEM: ≥0 <4.8.9
PyPI AccessControl
ECOSYSTEM: ≥5.0 <5.8
PyPI AccessControl
ECOSYSTEM: ≥6.0 <6.2
PyPI Zope
ECOSYSTEM: ≥5.0.0 <5.8.4

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

References

WEB https://github.com/zopefoundation/AccessControl/security/advisories/GHSA-8xv7-89vj-q48c
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2023-41050
WEB https://github.com/zopefoundation/AccessControl/commit/6bc32692e0d4b8d5cf64eae3d19de987c7375bc9
PACKAGE https://github.com/zopefoundation/AccessControl

Advisory provided by GitHub Security Advisory Database. Published: September 7, 2023, Modified: September 7, 2023

References

https://github.com/zopefoundation/AccessControl/security/advisories/GHSA-8xv7-89vj-q48c
https://github.com/zopefoundation/AccessControl/commit/6bc32692e0d4b8d5cf64eae3d19de987c7375bc9
Published: 2023-09-06T17:58:10.510Z
Last Modified: 2024-09-26T15:19:50.945Z
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