CVE-2024-31141: Privilege Escalation in Apache Kafka Clients

The core of this vulnerability lies in Kafka Clients' ability to accept configuration data from various sources, including disk and environment variables through ConfigProviders. If an attacker can influence these configuration sources, they can potentially modify Kafka's behavior, leading to privilege escalation. This could involve altering security settings, granting unauthorized access, or disrupting Kafka's operations. The impact is particularly severe in environments where Kafka configurations are not strictly controlled and are exposed to external influence, such as in cloud deployments or shared hosting scenarios. While the specific attack vectors are still being explored, the potential for unauthorized configuration changes presents a significant risk.

1. Reserved2024-03-28
2. Published2024-11-19
3. Modified2026-02-04
4. EPSS updated2026-04-02

The primary mitigation for CVE-2024-31141 is to upgrade to Apache Kafka Clients version 3.7.1 or later. Prior to upgrading, carefully review any custom configuration scripts or processes that rely on FileConfigProvider, DirectoryConfigProvider, or EnvVarConfigProvider to ensure they are not vulnerable to manipulation. If an immediate upgrade is not feasible, consider restricting access to configuration files and environment variables to trusted users and processes only. Implement strict input validation on any configuration data sourced from external parties. Monitor Kafka logs for any unusual configuration changes or attempts to access sensitive configuration files. After upgrading, confirm the fix by verifying that configuration files are only accessible by authorized users and processes.