Rack is a modular Ruby web server interface. Carefully crafted Range headers can cause a server to respond with an unexpectedly large response. Responding with such large responses could lead to a denial of service issue. Vulnerable applications will use the Rack::File middleware or the Rack::Utils.byte_ranges methods (this includes Rails applications). The vulnerability is fixed in 3.0.9.1 and 2.2.8.1.
The product does not properly control the allocation and maintenance of a limited resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Rack | Rack | 1.3.0 (including) | 2.2.8.1 (excluding) |
| Rack | Rack | 3.0.0 (including) | 3.0.9.1 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | pcs-0:0.10.18-2.el8_10 | * |
| Red Hat Enterprise Linux 8.2 Telecommunications Update Service | RedHat | pcs-0:0.10.4-6.el8_2.5 | * |
| Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions | RedHat | pcs-0:0.10.4-6.el8_2.5 | * |
| Red Hat Enterprise Linux 8.4 Telecommunications Update Service | RedHat | pcs-0:0.10.8-1.el8_4.5 | * |
| Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions | RedHat | pcs-0:0.10.8-1.el8_4.5 | * |
| Red Hat Enterprise Linux 8.6 Extended Update Support | RedHat | pcs-0:0.10.12-6.el8_6.5 | * |
| Red Hat Enterprise Linux 8.8 Extended Update Support | RedHat | pcs-0:0.10.15-4.el8_8.2 | * |
| Red Hat Enterprise Linux 9 | RedHat | pcs-0:0.11.7-2.el9_4 | * |
| Red Hat Enterprise Linux 9.0 Extended Update Support | RedHat | pcs-0:0.11.1-10.el9_0.5 | * |
| Red Hat Enterprise Linux 9.2 Extended Update Support | RedHat | pcs-0:0.11.4-7.el9_2.1 | * |
| Red Hat Satellite 6.15 for RHEL 8 | RedHat | rubygem-rack-0:2.2.8.1-1.el8sat | * |
| Red Hat Satellite 6.15 for RHEL 8 | RedHat | rubygem-rack-0:2.2.8.1-1.el8sat | * |
| Ruby-rack | Ubuntu | bionic | * |
| Ruby-rack | Ubuntu | esm-apps/bionic | * |
| Ruby-rack | Ubuntu | esm-apps/focal | * |
| Ruby-rack | Ubuntu | esm-apps/jammy | * |
| Ruby-rack | Ubuntu | esm-apps/xenial | * |
| Ruby-rack | Ubuntu | esm-infra-legacy/trusty | * |
| Ruby-rack | Ubuntu | focal | * |
| Ruby-rack | Ubuntu | jammy | * |
| Ruby-rack | Ubuntu | mantic | * |
| Ruby-rack | Ubuntu | noble | * |
| Ruby-rack | Ubuntu | trusty | * |
| Ruby-rack | Ubuntu | trusty/esm | * |
| Ruby-rack | Ubuntu | upstream | * |
| Ruby-rack | Ubuntu | xenial | * |
Mitigation of resource exhaustion attacks requires that the target system either:
The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.