CVE Vulnerability
CVE-2020-26281
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.
References
| Link | Resource |
|---|---|
| https://github.com/http-rs/async-h1/security/advisories/GHSA-4vr9-8cjf-vf9c | Third Party Advisory |
| https://github.com/http-rs/async-h1/releases/tag/v2.3.0 | Release Notes Third Party Advisory |
Configurations
Configuration 1
|
Information
Published : 2020-12-21 10:15
Updated : 2021-02-16 05:16
NVD link : CVE-2020-26281
Mitre link : CVE-2020-26281
Products Affected
No products.
CWE
CWE-444
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')