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

What is CVE-2023-43123?

CVE-2023-43123 is a medium-severity vulnerability in Apache Storm, published on 23 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-200

Which versions are affected by CVE-2023-43123?

2 open source packages ship an affected version, including org.apache.storm:storm-core. It affects 1 product.

Products include Apache Storm.

How do I fix CVE-2023-43123?

Upgrade org.apache.storm:storm-core to 2.6.0 or later.

Is CVE-2023-43123 being exploited?

There is no known exploitation of CVE-2023-43123 in the wild and no public exploit code.

Other vulnerabilities in Apache Storm

• CVE-2021-38294 Shell Command Injection Vulnerability in Nimbus Thrift Server Critical 9.8
• CVE-2021-40865 Unsafe Pre-Authentication Deserialization In Workers Critical 9.8
• CVE-2018-11779 Deserialization of Untrusted Data in Apache Storm Critical 9.8
• CVE-2015-3188 Apache Storm remote code execution vulnerability Critical 9.8
• CVE-2026-35337 Apache Storm Client: RCE through Unsafe Deserialization via Kerberos TGT Credential Handling High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-85p4-q357-72h9.