CVE-2022-39294 (DoS) Denial of Service from unchecked request length in conduit-hyper

2022-10-3100:00:00

CWE-400

GitHub_M

www.cve.org

cve-2022-39294; denial of service; unchecked request length; conduit-hyper; hyper server; memory allocation; panic; content-length; status 400; bad request; rust's crates.io; cloud infrastructure; production use; public internet

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

0.001 Low

EPSS

Percentile

38.4%

JSON

conduit-hyper integrates a conduit application with the hyper server. Prior to version 0.4.2, conduit-hyper did not check any limit on a request’s length before calling hyper::body::to_bytes. An attacker could send a malicious request with an abnormally large Content-Length, which could lead to a panic if memory allocation failed for that request. In version 0.4.2, conduit-hyper sets an internal limit of 128 MiB per request, otherwise returning status 400 (“Bad Request”). This crate is part of the implementation of Rust’s crates.io, but that service is not affected due to its existing cloud infrastructure, which already drops such malicious requests. Even with the new limit in place, conduit-hyper is not recommended for production use, nor to directly serve the public Internet.

CNA Affected

[
  {
    "vendor": "conduit-rust",
    "product": "conduit-hyper",
    "versions": [
      {
        "version": ">= 0.2.0-alpha.3, < 0.4.2",
        "status": "affected"
      }
    ]
  }
]