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CVE-2021-44521

9.1 · CRITICAL

When running Apache Cassandra with the following configuration: enable_user_defined_functions: true enable_scripted_user_defined_functions: true enable_user_defined_functions_threads: false it is p…

Published Feb 11, 2022CWE-94EPSS 57.53%

Overview

CVE-2021-44521 is a critical-severity vulnerability. It was published on February 11, 2022 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

When running Apache Cassandra with the following configuration: enable_user_defined_functions: true enable_scripted_user_defined_functions: true enable_user_defined_functions_threads: false it is possible for an attacker to execute arbitrary code on the host. The attacker would need to have enough permissions to create user defined functions in the cluster to be able to exploit this. Note that this configuration is documented as unsafe, and will continue to be considered unsafe after this CVE.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.openwall.com/lists/oss-security/2022/02/11/4Refjfrog.com/blog/cve-2021-44521-exploiting-apache-cassandra-user-defined-functions-for-remote-code-execution/Reflists.apache.org/thread/y4nb9s4co34j8hdfmrshyl09lokm7356Refsecurity.netapp.com/advisory/ntap-20220225-0001/Refwww.openwall.com/lists/oss-security/2022/02/11/4Refjfrog.com/blog/cve-2021-44521-exploiting-apache-cassandra-user-defined-functions-for-remote-code-execution/Reflists.apache.org/thread/y4nb9s4co34j8hdfmrshyl09lokm7356Refsecurity.netapp.com/advisory/ntap-20220225-0001/

How CyberStrike helps

Frequently asked questions

What is CVE-2021-44521?

CVE-2021-44521 is a critical-severity vulnerability. It was published on February 11, 2022 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2021-44521?

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-44521?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-44521?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-44521 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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