Eclipse Jetty's ThreadLimitHandler.getRemote() vulnerable to remote DoS attacks

Impact

Remote DOS attack can cause out of memory

Description

There exists a security vulnerability in Jetty's ThreadLimitHandler.getRemote() which
can be exploited by unauthorized users to cause remote denial-of-service (DoS) attack. By
repeatedly sending crafted requests, attackers can trigger OutofMemory errors and exhaust the
server's memory.

Affected Versions

• Jetty 12.0.0-12.0.8 (Supported)
• Jetty 11.0.0-11.0.23 (EOL)
• Jetty 10.0.0-10.0.23 (EOL)
• Jetty 9.3.12-9.4.55 (EOL)

Patched Versions

• Jetty 12.0.9
• Jetty 11.0.24
• Jetty 10.0.24
• Jetty 9.4.56

Workarounds

Do not use ThreadLimitHandler.
Consider use of QoSHandler instead to artificially limit resource utilization.

References

Jetty 12 - https://github.com/jetty/jetty.project/pull/11723