CVE-2021-38512: HTTP Request Smuggling in actix-http
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.
References
- github.com/actix/actix-web
- github.com/actix/actix-web/commit/e965d8298f421e9c89fe98b1300b8361e948c324
- github.com/actix/actix-web/pull/2363
- github.com/advisories/GHSA-8928-2fgm-6x9x
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/67URRW4K47SR6LNQB4YALPLGGQMQK7HO
- nvd.nist.gov/vuln/detail/CVE-2021-38512
- raw.githubusercontent.com/rustsec/advisory-db/main/crates/actix-http/RUSTSEC-2021-0081.md
- rustsec.org/advisories/RUSTSEC-2021-0081.html
Code Behaviors & Features
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