CVE-2020-8908

Summary

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.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products we track (3)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://github.com/google/guava/commit/fec0dbc4634006a6162cfd4d0d09c962073ddf40 ↗

Additional information

• NVD record
• https://github.com/google/guava/commit/fec0dbc4634006a6162cfd4d0d09c962073ddf40Patch
• https://github.com/google/guava/issues/4011Patch
• https://lists.apache.org/thread.html/r007add131977f4f576c232b25e024249a3d16f66aad14a4b52819d21%40%3Ccommon-issues.hadoop.apache.org%3EAdvisory
• https://lists.apache.org/thread.html/r07ed3e4417ad043a27bee7bb33322e9bfc7d7e6d1719b8e3dfd95c14%40%3Cdev.drill.apache.org%3EAdvisory
• https://lists.apache.org/thread.html/r161b87f8037bbaff400194a63cd2016c9a69f5949f06dcc79beeab54%40%3Cdev.drill.apache.org%3EAdvisory
• https://lists.apache.org/thread.html/r215b3d50f56faeb2f9383505f3e62faa9f549bb23e8a9848b78a968e%40%3Ccommits.ws.apache.org%3EAdvisory
• https://lists.apache.org/thread.html/r294be9d31c0312d2c0837087204b5d4bf49d0552890e6eec716fa6a6%40%3Cyarn-issues.hadoop.apache.org%3EAdvisory
• https://lists.apache.org/thread.html/r2fe45d96eea8434b91592ca08109118f6308d60f6d0e21d52438cfb4%40%3Cdev.drill.apache.org%3EAdvisory