CVE-2023-41050

Summary

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.

Affected Software

VendorProductVersion RangeStatus
zopefoundationAccessControlAccessControl: < 4.4affected
zopefoundationAccessControlAccessControl: >= 5.0, < 5.8affected
zopefoundationAccessControlAccessControl: >= 6.0, < 6.2affected
zopefoundationAccessControlZope: < 4.8.9affected
zopefoundationAccessControlZope: >= 5.0.0, < 5.8.4affected

Weaknesses

  • CWE-200: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References