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      <title>CVE-2023-41039 — Sandbox escape via various forms of "format" in RestrictedPython</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2023-41039</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; zopefoundation RestrictedPython&lt;/p&gt;
&lt;p&gt;RestrictedPython is a restricted execution environment for Python to run untrusted code. Python&amp;#39;s &amp;#34;format&amp;#34; functionality allows someone controlling the format string to &amp;#34;read&amp;#34; 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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; zopefoundation RestrictedPython&lt;/p&gt;
&lt;p&gt;RestrictedPython is a restricted execution environment for Python to run untrusted code. Python&amp;#39;s &amp;#34;format&amp;#34; functionality allows someone controlling the format string to &amp;#34;read&amp;#34; 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.&lt;/p&gt;</content:encoded>
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