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HTTP/2 client can force the server to allocate a humongous byte buffer that may lead to OoM and subsequently the JVM to exit

High
joakime published GHSA-889j-63jv-qhr8 May 8, 2025

Package

maven org.eclipse.jetty.http2:jetty-http2-common (Maven)

Affected versions

>=12.0.0, <=12.0.16

Patched versions

12.0.17

Description

Original Report

Bjørn Seime [email protected]
10:27 AM (10 minutes ago)

Hi.

We've identified a potential denial of service vulnerability affecting Jetty HTTP/2 servers on 12.0.16.

A HTTP/2 client can force the server to allocate a humongous byte buffer that may lead to OoM and subsequently the JVM to exit.

See attached zip file for readme and a full proof of concept.

--
Bjorn C Seime
Vespa.ai, Trondheim - Norway

Impact

Remote peers can cause the JVM to crash or continuously report OOM.

Patches

12.0.17

Workarounds

No workarounds.

References

#12690

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVE ID

CVE-2025-1948

Weaknesses

Credits