Partial path traversal vulnerability

org.openrewrite.java.security.PartialPathTraversalVulnerability
_Replaces dir.getCanonicalPath().startsWith(parent.getCanonicalPath(), which is vulnerable to partial path traversal attacks, with the more secure dir.getCanonicalFile().toPath().startsWith(parent.getCanonicalFile().toPath()).
To demonstrate this vulnerability, consider "/usr/outnot".startsWith("/usr/out"). The check is bypassed although /outnot is not under the /out directory. It's important to understand that the terminating slash may be removed when using various String representations of the File object. For example, on Linux, println(new File("/var")) will print /var, but println(new File("/var", "/") will print /var/; however, println(new File("/var", "/").getCanonicalPath()) will print /var._
Tags
CWE-22
Source
​Github, Issue Tracker, Maven Central​
groupId: org.openrewrite.recipe
artifactId: rewrite-java-security
version: 1.25.0
Contributors
​Jonathan Leitschuh​
​Patrick​
​Jonathan Schnéider​
​Knut Wannheden​
Usage
This recipe has no required configuration options. It can be activated by adding a dependency on org.openrewrite.recipe:rewrite-java-security:1.25.0 in your build file or by running a shell command (in which case no build changes are needed):
Gradle
Maven POM
Maven Command Line
build.gradle
plugins {
    id("org.openrewrite.rewrite") version("5.40.4")
}
​
rewrite {
    activeRecipe("org.openrewrite.java.security.PartialPathTraversalVulnerability")
}
​
repositories {
    mavenCentral()
}
​
dependencies {
    rewrite("org.openrewrite.recipe:rewrite-java-security:1.25.0")
}
pom.xml
<project>
  <build>
    <plugins>
      <plugin>
        <groupId>org.openrewrite.maven</groupId>
        <artifactId>rewrite-maven-plugin</artifactId>
        <version>4.45.0</version>
        <configuration>
          <activeRecipes>
            <recipe>org.openrewrite.java.security.PartialPathTraversalVulnerability</recipe>
          </activeRecipes>
        </configuration>
        <dependencies>
          <dependency>
            <groupId>org.openrewrite.recipe</groupId>
            <artifactId>rewrite-java-security</artifactId>
            <version>1.25.0</version>
          </dependency>
        </dependencies>
      </plugin>
    </plugins>
  </build>
</project>
shell
mvn -U org.openrewrite.maven:rewrite-maven-plugin:run \
  -Drewrite.recipeArtifactCoordinates=org.openrewrite.recipe:rewrite-java-security:RELEASE \
  -Drewrite.activeRecipes=org.openrewrite.java.security.PartialPathTraversalVulnerability
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Last modified 22d ago