CVE-2023-43123 Apache Storm: Local Information Disclosure Vulnerability in Storm-core on Unix-Like systems due temporary files

2023-11-2309:16:34

CWE-200

apache

www.cve.org

apache storm

information disclosure

unix-like systems

temporary directory

permissions

file creation

vulnerability

file deletion

upgrade

solution

5.3 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

On unix-like systems, the temporary directory is shared between all user. As such, writing to this directory using APIs that do not explicitly set the file/directory permissions can lead to information disclosure. Of note, this does not impact modern MacOS Operating Systems.

The method File.createTempFile on unix-like systems creates a file with predefined name (so easily identifiable) and by default will create this file with the permissions -rw-r–r–. Thus, if sensitive information is written to this file, other local users can read this information.

File.createTempFile(String, String) will create a temporary file in the system temporary directory if the ‘java.io.tmpdir’ system property is not explicitly set.

This affects the class https://github.com/apache/storm/blob/master/storm-core/src/jvm/org/apache/storm/utils/TopologySpoutLag.java#L99 and was introduced by https://issues.apache.org/jira/browse/STORM-3123

In practice, this has a very limited impact as this class is used only if ui.disable.spout.lag.monitoring

is set to false, but its value is true by default.
Moreover, the temporary file gets deleted soon after its creation.

The solution is to use Files.createTempFile https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/nio/file/Files.html#createTempFile(java.lang.String,java.lang.String,java.nio.file.attribute.FileAttribute...) instead.

We recommend that all users upgrade to the latest version of Apache Storm.

CNA Affected

[
  {
    "collectionURL": "https://repo.maven.apache.org/maven2",
    "defaultStatus": "affected",
    "packageName": "storm-core",
    "product": "Apache Storm",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "2.6.0",
        "status": "affected",
        "version": "2.0.0",
        "versionType": "maven"
      }
    ]
  }
]