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      <title>CVE-2024-56337 — Apache Tomcat: RCE due to TOCTOU issue in JSP compilation - CVE-2024-50379 mitigation was incomplete</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2024-56337</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Apache Software Foundation Apache Tomcat&lt;/p&gt;
&lt;p&gt;Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in Apache Tomcat.&lt;/p&gt;
&lt;p&gt;This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.1, from 10.1.0-M1 through 10.1.33, from 9.0.0.M1 through 9.0.97.
The following versions were EOL at the time the CVE was created but are 
known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions 
may also be affected.&lt;/p&gt;
&lt;p&gt;The mitigation for CVE-2024-50379 was incomplete.&lt;/p&gt;
&lt;p&gt;Users running Tomcat on a case insensitive file system with the default servlet write enabled (readonly initialisation 
parameter set to the non-default value of false) may need additional configuration to fully mitigate CVE-2024-50379 depending on which version of Java they are using with Tomcat:
- running on Java 8 or Java 11: the system property sun.io.useCanonCaches must be explicitly set to false (it defaults to true)
- running on Java 17: the system property sun.io.useCanonCaches, if set, must be set to false (it defaults to false)
- running on Java 21 onwards: no further configuration is required (the system property and the problematic cache have been removed)&lt;/p&gt;
&lt;p&gt;Tomcat 11.0.3, 10.1.35 and 9.0.99 onwards will include checks that sun.io.useCanonCaches is set appropriately before allowing the default servlet to be write enabled on a case insensitive file system. Tomcat will also set sun.io.useCanonCaches to false by default where it can.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Apache Software Foundation Apache Tomcat&lt;/p&gt;
&lt;p&gt;Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in Apache Tomcat.&lt;/p&gt;
&lt;p&gt;This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.1, from 10.1.0-M1 through 10.1.33, from 9.0.0.M1 through 9.0.97.
The following versions were EOL at the time the CVE was created but are 
known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions 
may also be affected.&lt;/p&gt;
&lt;p&gt;The mitigation for CVE-2024-50379 was incomplete.&lt;/p&gt;
&lt;p&gt;Users running Tomcat on a case insensitive file system with the default servlet write enabled (readonly initialisation 
parameter set to the non-default value of false) may need additional configuration to fully mitigate CVE-2024-50379 depending on which version of Java they are using with Tomcat:
- running on Java 8 or Java 11: the system property sun.io.useCanonCaches must be explicitly set to false (it defaults to true)
- running on Java 17: the system property sun.io.useCanonCaches, if set, must be set to false (it defaults to false)
- running on Java 21 onwards: no further configuration is required (the system property and the problematic cache have been removed)&lt;/p&gt;
&lt;p&gt;Tomcat 11.0.3, 10.1.35 and 9.0.99 onwards will include checks that sun.io.useCanonCaches is set appropriately before allowing the default servlet to be write enabled on a case insensitive file system. Tomcat will also set sun.io.useCanonCaches to false by default where it can.&lt;/p&gt;</content:encoded>
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