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.
Metrics
CVSS Version: 3.1 |
Base Score: 8.3 HIGH Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L
l➤ Impact Metrics: Confidentiality Impact (C)* HIGH Integrity Impact (I)* HIGH Availability Impact (A)* LOW
Weakness Enumeration (CWE)
CWE-ID: CWE-74 CWE Name: CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component (
Injection
) Source: zopefoundation
Common Attack Pattern Enumeration and Classification (CAPEC)