| Vulnerability Name: | CVE-2021-41136 (CCN-211365) | ||||||||||||||||||||||||||||||||||||
| Assigned: | 2021-10-12 | ||||||||||||||||||||||||||||||||||||
| Published: | 2021-10-12 | ||||||||||||||||||||||||||||||||||||
| Updated: | 2022-10-12 | ||||||||||||||||||||||||||||||||||||
| Summary: | 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`. | ||||||||||||||||||||||||||||||||||||
| CVSS v3 Severity: | 3.7 Low (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N) 3.2 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C)
4.0 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C)
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| CVSS v2 Severity: | 3.6 Low (CVSS v2 Vector: AV:N/AC:H/Au:S/C:P/I:P/A:N)
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| Vulnerability Type: | CWE-444 | ||||||||||||||||||||||||||||||||||||
| Vulnerability Consequences: | Gain Access | ||||||||||||||||||||||||||||||||||||
| References: | Source: MITRE Type: CNA CVE-2021-41136 Source: XF Type: UNKNOWN puma-cve202141136-request-samuggling(211365) Source: MISC Type: Patch, Third Party Advisory https://github.com/puma/puma/commit/acdc3ae571dfae0e045cf09a295280127db65c7f Source: CCN Type: Puma GIT Repository Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') in puma Source: CONFIRM Type: Third Party Advisory https://github.com/puma/puma/security/advisories/GHSA-48w2-rm65-62xx Source: MLIST Type: Mailing List, Third Party Advisory [debian-lts-announce] 20220827 [SECURITY] [DLA 3083-1] puma security update Source: GENTOO Type: Third Party Advisory GLSA-202208-28 Source: DEBIAN Type: Third Party Advisory DSA-5146 | ||||||||||||||||||||||||||||||||||||
| Vulnerable Configuration: | Configuration 1: Configuration 2: Configuration CCN 1:  Denotes that component is vulnerable | ||||||||||||||||||||||||||||||||||||
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