UBUNTU-CVE-2020-8908

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UBUNTU-CVE-2020-8908

Summary:

Details: A temp directory creation vulnerability exists in all versions of Guava, allowing an attacker with access to the machine to potentially access data in a temporary directory created by the Guava API com.google.common.io.Files.createTempDir(). By default, on unix-like systems, the created directory is world-readable (readable by an attacker with access to the system). The method in question has been marked @Deprecated in versions 30.0 and later and should not be used. For Android developers, we recommend choosing a temporary directory API provided by Android, such as context.getCacheDir(). For other Java developers, we recommend migrating to the Java 7 API java.nio.file.Files.createTempDirectory() which explicitly configures permissions of 700, or configuring the Java runtime's java.io.tmpdir system property to point to a location whose permissions are appropriately configured.

References: https://ubuntu.com/security/CVE-2020-8908, https://github.com/google/guava/issues/4011, https://github.com/google/guava/commit/fec0dbc4634006a6162cfd4d0d09c962073ddf40, https://github.com/google/guava/issues/4011#issuecomment-1573923586, https://github.com/google/guava/releases/tag/v32.0.0, https://github.com/google/guava/issues/2575, https://www.cve.org/CVERecord?id=CVE-2020-8908