CVE-2025-24813 Vulnerability

The root cause of CVE-2025-24813 lies in improper parameter handling within Apache Tomcat’s HTTP/2 request parsing logic, specifically around variable length queries. This flaw creates an exploitable condition where attackers can inject malicious bytecode into the server memory via crafted payloads. For example, using a header such as Content-Type in an oversized query structure exploits boundary-check failures in memory allocation. This vulnerability is triggered through vulnerable memory paths, enabling code injection and execution without authentication.

Tactics, Techniques & Procedures (TTPs)

Attackers exploit CVE-2025-24813 by sending malformed HTTP requests targeting web applications running on unpatched Apache Tomcat servers. Techniques involve leveraging publicly available proof-of-concepts (PoCs), bypassing traditional firewalls using obfuscated payloads, and establishing persistence through shell commands embedded in the payload.

Indicators of compromise

Key indicators of compromise for CVE-2025-24813 include the presence of unusual HTTP request logs with irregular query structures, unexpected processes spawned under Tomcat’s service, and outbound connections to unfamiliar IPs or domains. Tracking these anomalies via SIEM platforms is critical.

Known proof-of-concepts & exploits

There are verified PoCs available online, including exploits utilizing Metasploit modules for remote code execution. Real-world exploitation has been observed within targeted campaigns affecting financial institutions and healthcare sectors, primarily leveraging spear-phishing emails to redirect traffic to malicious servers.