CVE - CVE-2021-41136

CVE-ID
CVE-2021-41136	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
Puma is a HTTP 1.1 server for Ruby/Rack applications. Prior to versions 5.5.1 and 4.3.9, using `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. The only proxy which has this behavior, as far as the Puma team is aware of, is Apache Traffic Server. If the proxy uses persistent connections and the client adds another request in via HTTP pipelining, the proxy may mistake it as the first request's body. Puma, however, would see it as two requests, and when processing the second request, send back a response that the proxy does not expect. If the proxy has reused the persistent connection to Puma to send another request for a different client, the second response from the first client will be sent to the second client. This vulnerability was patched in Puma 5.5.1 and 4.3.9. As a workaround, do not use Apache Traffic Server with `puma`.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://github.com/puma/puma/security/advisories/GHSA-48w2-rm65-62xx URL:https://github.com/puma/puma/security/advisories/GHSA-48w2-rm65-62xx DEBIAN:DSA-5146 URL:https://www.debian.org/security/2022/dsa-5146 GENTOO:GLSA-202208-28 URL:https://security.gentoo.org/glsa/202208-28 MISC:https://github.com/puma/puma/commit/acdc3ae571dfae0e045cf09a295280127db65c7f URL:https://github.com/puma/puma/commit/acdc3ae571dfae0e045cf09a295280127db65c7f MLIST:[debian-lts-announce] 20220827 [SECURITY] [DLA 3083-1] puma security update URL:https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20210915	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20210915)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)