CVE-2021-44521

Remote code execution for scripted UDFs

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.

Affected

Apache Software Foundation · Apache Cassandra

CVSS v3.1 NVD

9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS v2.0 NVD

8.5 HIGHAV:N/AC:M/Au:S/C:C/I:C/A:C

EPSS

57.53% chance of exploitation in the next 30 days, 99th percentile

Nuclei

critical

Published

2022-02-11

Updated

2024-08-04

Proof-of-concept exploits (2)

• WoodenKlaas/CVE-2021-4452110★ · 2022-02-24
• Yeyvo/poc-CVE-2021-445211★ · 2022-12-03

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/network/cves/2021/CVE-2021-44521.yaml

Security advisories

• https://lists.apache.org/thread/y4nb9s4co34j8hdfmrshyl09lokm7356
• http://www.openwall.com/lists/oss-security/2022/02/11/4
• https://jfrog.com/blog/cve-2021-44521-exploiting-apache-cassandra-user-defined-functions-…
• https://security.netapp.com/advisory/ntap-20220225-0001
• advisories/GHSA-8ffc-79xg-29w8

References

• CVE Record
• NVD entry