CVE-2024-55886: Authentication Bypass in OpenSearch Data Prepper

The primary impact of CVE-2024-55886 is the potential for unauthorized data ingestion into your OpenSearch cluster. Attackers could inject malicious or irrelevant data, potentially disrupting operations, skewing analytics, or even introducing backdoors. The scope of the impact depends on the sensitivity of the OpenTelemetry Logs being processed. If the logs contain sensitive information (e.g., personally identifiable information (PII), financial data, or proprietary business data), a successful exploitation could lead to data breaches and regulatory compliance violations. Lateral movement within the environment is unlikely directly from this vulnerability, but compromised data could be used to target other systems. The blast radius extends to any downstream applications or services that rely on the processed data from OpenSearch.

1. Reserved2024-12-12
2. Published2024-12-12
3. Modified2024-12-13
4. EPSS updated2026-04-02

The primary mitigation for CVE-2024-55886 is to upgrade OpenSearch Data Prepper to version 2.10.2 or later. If an immediate upgrade is not feasible, consider disabling or removing custom authentication plugins until a patch can be applied. As a temporary workaround, restrict access to the OpenTelemetry Logs source to trusted networks or users. Implement strict input validation and sanitization on the ingested data to minimize the impact of potentially malicious data. Monitor OpenSearch logs for unusual activity or unauthorized data sources. While a WAF or proxy cannot directly address this authentication bypass, they can help detect and block suspicious traffic patterns associated with data ingestion attempts.