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CVE-2004-2381

CVE-2004-2381 is a security vulnerability in jetty jetty http server. O3 Security detects and blocks CVE-2004-2381 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.

HttpRequest.java in Jetty HTTP Server before 4.2.19 allows remote attackers to cause denial of service (memory usage and application crash) via HTTP requests with a large Content-Length.

Published
Dec 31, 2004
Updated
Jun 16, 2026
Affected
1 product
Patched
See advisory
Exploits
None indexed
Exploitation data as of Jun 16, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Description

HttpRequest.java in Jetty HTTP Server before 4.2.19 allows remote attackers to cause denial of service (memory usage and application crash) via HTTP requests with a large Content-Length.

Affected Products

1 product · 67 configurations
Application
jetty http serverjetty
67 versions
4.0_rc14.0_rc24.0_rc34.0.04.0.14.0.1_rc04.0.1_rc14.0.1_rc24.0.24.0.34.0.44.0.5

Detection & mitigation playbook

Vendor / appliance
  1. Detect

    Inventory every jetty jetty http server deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for exploitation at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.

  2. Remediation status

    No patch has shipped for CVE-2004-2381 yet — track the jetty jetty http server advisory for a fixed release and apply the workarounds below in the meantime.

  3. Mitigate without a patch

    Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.

  4. How O3 protects you

    O3 detects and blocks CVE-2004-2381 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.

Tailored to CVE-2004-2381. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

HttpRequest.java in Jetty HTTP Server before 4.2.19 allows remote attackers to cause denial of service (memory usage and application crash) via HTTP requests with a large Content-Length.
O3 Security · Runtime Protection

Is CVE-2004-2381 being exploited in your environment?

O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2004-2381 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.

CVE-2004-2381: Jetty Http Server Denial of… | O3 Security