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GHSA-68xg-gqqm-vgj8 (puma): Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in puma

ADVISORIES

GEM

puma

SEVERITY

CVSS v3.x: 6.5 (Medium)

PATCHED VERSIONS

  • ~> 5.6.7
  • >= 6.3.1

DESCRIPTION

Impact

Prior to version 6.3.1, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies and zero-length Content-Length headers in a way that allowed HTTP request smuggling.

The following vulnerabilities are addressed by this advisory:

  • Incorrect parsing of trailing fields in chunked transfer encoding bodies
  • Parsing of blank/zero-length Content-Length headers\r\n

Patches

The vulnerability has been fixed in 6.3.1 and 5.6.7.

Workarounds

No known workarounds.

References

HTTP Request Smuggling

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