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How CVE-2025-48988 Works
CVE-2025-48988 is a critical vulnerability in Apache Tomcat that allows attackers to exploit uncontrolled resource allocation. The flaw occurs when processing specially crafted HTTP/2 requests, causing the server to consume excessive memory without proper throttling. Attackers can send multiple malicious streams with large headers or data frames, overwhelming the server’s memory pool. This leads to denial-of-service (DoS) conditions as Tomcat fails to release allocated resources. The vulnerability affects HTTP/2 connections where the server doesn’t enforce proper limits on concurrent streams or request sizes.
DailyCVE Form
Platform: Apache Tomcat
Version: 9.0.0.M1-9.0.105
Vulnerability: Resource exhaustion
Severity: Critical
Date: 06/16/2025
Prediction: Patch by 07/15/2025
What Undercode Say
Check Tomcat version:
./catalina.sh version
Memory monitoring:
jstat -gc <tomcat_pid>
Exploit PoC (simulated):
while true; do curl -H "Large-Header: $(printf 'A%.0s' {1..50000})" http://target:8080; done
How Exploit
Send crafted HTTP/2 requests with oversized headers or unlimited streams to exhaust server memory.
Protection from this CVE
Update to Tomcat 11.0.8
Impact
Full system DoS
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
