Vulnerability Description
hyper is an HTTP library for Rust. In versions prior to 0.14.10, hyper's HTTP server and client code had a flaw that could trigger an integer overflow when decoding chunk sizes that are too big. This allows possible data loss, or if combined with an upstream HTTP proxy that allows chunk sizes larger than hyper does, can result in "request smuggling" or "desync attacks." The vulnerability is patched in version 0.14.10. Two possible workarounds exist. One may reject requests manually that contain a `Transfer-Encoding` header or ensure any upstream proxy rejects `Transfer-Encoding` chunk sizes greater than what fits in 64-bit unsigned integers.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Hyper | Hyper | < 0.14.10 |
Related Weaknesses (CWE)
References
- https://github.com/hyperium/hyper/security/advisories/GHSA-5h46-h7hh-c6x9ExploitThird Party Advisory
- https://github.com/hyperium/hyper/security/advisories/GHSA-5h46-h7hh-c6x9ExploitThird Party Advisory
FAQ
What is CVE-2021-32714?
CVE-2021-32714 is a vulnerability with a CVSS score of 5.9 (MEDIUM). hyper is an HTTP library for Rust. In versions prior to 0.14.10, hyper's HTTP server and client code had a flaw that could trigger an integer overflow when decoding chunk sizes that are too big. This ...
How severe is CVE-2021-32714?
CVE-2021-32714 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-32714?
Check the references section above for vendor advisories and patch information. Affected products include: Hyper Hyper.