GHSA-4vr9-8cjf-vf9c
Suggest an improvement- Source
- https://github.com/advisories/GHSA-4vr9-8cjf-vf9c
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/10/GHSA-4vr9-8cjf-vf9c/GHSA-4vr9-8cjf-vf9c.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-4vr9-8cjf-vf9c
- Aliases
- Published
- 2021-10-12T16:00:37Z
- Modified
- 2023-11-08T04:03:17.843075Z
- Severity
-
- 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N CVSS Calculator
- Summary
- Async-h1 request smuggling possible with long unread bodies
- Details
-
Impact
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.
Patches
This has been addressed in async-h1 2.3.0 and previous versions have been yanked.
Workarounds
none
References
https://github.com/http-rs/async-h1/releases/tag/v2.3.0
For more information
If you have any questions or comments about this advisory: * Open an issue in async-h1 * Contact a core team member on zulip or discord
- Database specific
{ "nvd_published_at": "2020-12-21T22:15:00Z", "github_reviewed_at": "2021-10-08T22:14:28Z", "severity": "MODERATE", "github_reviewed": true, "cwe_ids": [ "CWE-444" ] }- References
Affected packages
crates.io / async-h1
Package
- Name
- async-h1
- View open source insights on deps.dev
- Purl
- pkg:cargo/async-h1