Arbitrary Code Injection The advisory has been revoked - it doesn't affect any version of package opendaylight.src (opens in a new tab)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-OPENDAYLIGHTSRC-14925302
- published14 Jan 2026
- disclosed1 Jan 2021
Introduced: 1 Jan 2021
CVE-2021-44521 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream opendaylight.src package and not the opendaylight.src package as distributed by RHEL.
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.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2053774
- https://access.redhat.com/security/cve/CVE-2021-44521
- http://www.openwall.com/lists/oss-security/2022/02/11/4
- https://jfrog.com/blog/cve-2021-44521-exploiting-apache-cassandra-user-defined-functions-for-remote-code-execution/
- https://lists.apache.org/thread/y4nb9s4co34j8hdfmrshyl09lokm7356
- https://security.netapp.com/advisory/ntap-20220225-0001/
- https://github.com/projectdiscovery/nuclei-templates/blob/main/network/cves/2021/CVE-2021-44521.yaml