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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cve-icon MITRE Information

Status: PUBLISHED

Assigner: GitHub_M

Published: 2021-07-07T20:05:11

Updated: 2021-07-07T20:05:11

Reserved: 2021-05-12T00:00:00


Link: CVE-2021-32715

JSON object: View

cve-icon NVD Information

Status : Analyzed

Published: 2021-07-07T20:15:08.750

Modified: 2021-07-22T12:49:47.863


Link: CVE-2021-32715

JSON object: View

cve-icon Redhat Information

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CWE