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CVE-2022-23634

Puma is a Ruby/Rack web server built for parallelism.

Impact

Puma is a Ruby/Rack web server built for parallelism. Prior to `puma` version `5.6.2`, `puma` may not always call `close` on the response body. Rails, prior to version `7.0.2.2`, depended on the response body being closed in order for its `CurrentAttributes` implementation to work correctly. The combination of these two behaviors (Puma not closing the body + Rails' Executor implementation) causes information leakage. This problem is fixed in Puma versions 5.6.2 and 4.3.11. This problem is fixed in Rails versions 7.02.2, 6.1.4.6, 6.0.4.6, and 5.2.6.2. Upgrading to a patched Rails _or_ Puma version fixes the vulnerability.

Affected products

VendorProductAffected versions
PumaPuma
before 4.3.11
from 5.0.0 before 5.6.2
RubyonrailsRails
from 5.0.0 before 5.2.6.2
from 6.0.0 before 6.0.4.6
from 6.1.0 before 6.1.4.6
from 7.0.0 before 7.0.2.2
DebianDebian Linux
Versions 9.0, 10.0, 11.0
FedoraprojectFedora
Versions 35, 36, 37

Weakness classification

CWE-200CWE-404

References