high7.5
CVE-2021-38512
HTTP Request Smuggling in actix-http
Impact
Affected versions of this crate did not properly detect invalid requests that could allow HTTP/1 request smuggling (HRS) attacks when running alongside a vulnerable front-end proxy server. This can result in leaked internal and/or user data, including credentials, when the front-end proxy is also vulnerable. Popular front-end proxies and load balancers already mitigate HRS attacks so it is recommended that they are also kept up to date; check your specific set up. You should upgrade even if the front-end proxy receives exclusively HTTP/2 traffic and connects to the back-end using HTTP/1; several downgrade attacks are known that can also expose HRS vulnerabilities.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | actix-http | < 2.2.1 | 2.2.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Actix | Actix-Http | before 3.0.0 Version 3.0.0 |
| Fedoraproject | Fedora | Version 34 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/67URRW4K47SR6LNQB4YALPLGGQMQK7HO/
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/actix-http/RUSTSEC-2021-0081.md
- https://rustsec.org/advisories/RUSTSEC-2021-0081.html
- https://github.com/advisories/GHSA-8928-2fgm-6x9x
- https://nvd.nist.gov/vuln/detail/CVE-2021-38512
- https://github.com/actix/actix-web/pull/2363
- https://github.com/actix/actix-web/commit/e965d8298f421e9c89fe98b1300b8361e948c324
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/67URRW4K47SR6LNQB4YALPLGGQMQK7HO/