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Debian LTS Advisory DLA-3083-1                [email protected]
https://www.debian.org/lts/security/                          Abhijith PA
August 28, 2022                               https://wiki.debian.org/LTS
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Package        : puma
Version        : 3.12.0-2+deb10u3
CVE ID         : CVE-2021-29509 CVE-2021-41136 CVE-2022-23634 
                 CVE-2022-24790

Multiple security issues have been found in puma, a web server for 
ruby/rack applications.

CVE-2021-29509

    Keepalive Connections Causing Denial Of Service in puma.

CVE-2021-41136

    puma with a proxy which forwards HTTP header values which contain 
    the LF character could allow HTTP request smugggling. A client 
    could smuggle a request through a proxy, causing the proxy to send 
    a response back to another unknown client.

CVE-2022-23634

    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.

CVE-2022-24790

    using Puma behind a proxy that does not properly validate that the 
    incoming HTTP request matches the RFC7230 standard, Puma and the 
    frontend proxy may disagree on where a request starts and ends. 
    This would allow requests to be smuggled via the front-end proxy 
    to Puma

For Debian 10 buster, these problems have been fixed in version
3.12.0-2+deb10u3.

We recommend that you upgrade your puma packages.

For the detailed security status of puma please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/puma

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS