Bugzilla – Bug 1188173
VUL-1: CVE-2021-32715: rust: hyper - Lenient Parsing of Content-Length Header When Prefixed with Plus Sign
Last modified: 2023-07-04 07:20:29 UTC
CVE-2021-32715 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. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-32715 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32715 https://github.com/rust-lang/rust/pull/28826/commits/123a83326fb95366e94a3be1a74775df4db97739 https://github.com/hyperium/hyper/security/advisories/GHSA-f3pg-qwvg-p99c
affects: - SUSE:SLE-15:Update/rust - SUSE:SLE-15-SP1:Update/rust
hyper was removed with version 1.46.0 (by 6654c5852f76d6b55ebdacc0d428cad5b3dbdbed) Which means SLE15-SP3 is not affected, because rust1.43 is out of support. SLE15 and SLE15-SP1 are now on 1.53.
closing