CVE-2021-41136

Published on: 10/12/2021 12:00:00 AM UTC

Last Modified on: 10/19/2021 07:07:00 PM UTC

CVE-2021-41136 - advisory for GHSA-48w2-rm65-62xx

Source: Mitre Source: Nist Print: PDF PDF
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N

Certain versions of Puma from Puma contain the following vulnerability:

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`.

  • CVE-2021-41136 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.
  • Affected Vendor/Software: URL Logo puma - puma version >= 5.0.0, < 5.5.1
  • Affected Vendor/Software: URL Logo puma - puma version < 4.3.9

CVSS3 Score: 4.6 - MEDIUM

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
NETWORK LOW LOW REQUIRED
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
UNCHANGED LOW LOW NONE

CVSS2 Score: 4.9 - MEDIUM

Access
Vector
Access
Complexity
Authentication
NETWORK MEDIUM SINGLE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
PARTIAL PARTIAL NONE

CVE References

Description Tags Link
Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') in puma · Advisory · puma/puma · GitHub github.com
text/html
URL Logo CONFIRM github.com/puma/puma/security/advisories/GHSA-48w2-rm65-62xx
Merge pull request from GHSA-48w2-rm65-62xx · puma/[email protected] · GitHub github.com
text/html
URL Logo MISC github.com/puma/puma/commit/acdc3ae571dfae0e045cf09a295280127db65c7f

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationPumaPumaAllAllAllAll
ApplicationPumaPumaAllAllAllAll
  • cpe:2.3:a:puma:puma:*:*:*:*:*:ruby:*:*:
  • cpe:2.3:a:puma:puma:*:*:*:*:*:ruby:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-41136 : Puma is a HTTP 1.1 server for Ruby/Rack applications. Prior to versions 5.5.1 and 4.3.9, using `pu… twitter.com/i/web/status/1… 2021-10-12 15:34:48
Twitter Icon @rubylandnews RubySec ➜ CVE-2021-41136 (puma): Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') in puma rubysec.com/advisories/CVE… 2021-10-12 18:25:04
© CVE.report 2021 Twitter Nitter Twitter Viewer |

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