hyper is an HTTP library for rust. hyper's HTTP/1 server code had a flaw that incorrectly parses and accepts requests with a `Content-Length` header with a prefixed plus sign, when it should have been rejected as illegal. This combined with an upstream HTTP proxy that doesn't parse such `Content-Length` headers, but forwards them, can result in "request smuggling" or "desync attacks". The flaw exists in all prior versions of hyper prior to 0.14.10, if built with `rustc` v1.5.0 or newer. The vulnerability is patched in hyper version 0.14.10. Two workarounds exist: One may reject requests manually that contain a plus sign prefix in the `Content-Length` header or ensure any upstream proxy handles `Content-Length` headers with a plus sign prefix.
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References
History
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2021-07-07T20:05:11
Updated: 2024-08-03T23:25:31.081Z
Reserved: 2021-05-12T00:00:00
Link: CVE-2021-32715
Vulnrichment
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NVD
Status : Modified
Published: 2021-07-07T20:15:08.750
Modified: 2024-11-21T06:07:35.213
Link: CVE-2021-32715
Redhat
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