Podatność CVE-2020-26281


Publikacja: 2020-12-21

Opis:
async-h1 is an asynchronous HTTP/1.1 parser for Rust (crates.io). There is a request smuggling vulnerability in async-h1 before version 2.3.0. This vulnerability affects any webserver that uses async-h1 behind a reverse proxy, including all such Tide applications. If the server does not read the body of a request which is longer than some buffer length, async-h1 will attempt to read a subsequent request from the body content starting at that offset into the body. One way to exploit this vulnerability would be for an adversary to craft a request such that the body contains a request that would not be noticed by a reverse proxy, allowing it to forge forwarded/x-forwarded headers. If an application trusted the authenticity of these headers, it could be misled by the smuggled request. Another potential concern with this vulnerability is that if a reverse proxy is sending multiple http clients' requests along the same keep-alive connection, it would be possible for the smuggled request to specify a long content and capture another user's request in its body. This content could be captured in a post request to an endpoint that allows the content to be subsequently retrieved by the adversary. This has been addressed in async-h1 2.3.0 and previous versions have been yanked.

Typ:

CWE-444

(Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling'))

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:N)

Ogólna skala CVSS
Znaczenie
Łatwość wykorzystania
5.8/10
4.9/10
8.6/10
Wymagany dostęp
Złożoność ataku
Autoryzacja
Zdalny
Średnia
Nie wymagana
Wpływ na poufność
Wpływ na integralność
Wpływ na dostępność
Częściowy
Częściowy
Brak
Affected software
Rust-lang -> Async-h1 

 Referencje:
https://github.com/http-rs/async-h1/releases/tag/v2.3.0
https://github.com/http-rs/async-h1/security/advisories/GHSA-4vr9-8cjf-vf9c

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