RUSTSEC-2021-0079

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Source

https://rustsec.org/advisories/RUSTSEC-2021-0079

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2021-0079.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2021-0079

Aliases

Published

2021-07-07T12:00:00Z

Modified

2023-11-01T04:55:28.339881Z

Severity

9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H CVSS Calculator

Summary

Integer overflow in `hyper`'s parsing of the `Transfer-Encoding` header leads to data loss

Details

When decoding chunk sizes that are too large, hyper's code would encounter an integer overflow. Depending on the situation, this could lead to data loss from an incorrect total size, or in rarer cases, a request smuggling attack.

To be vulnerable, you must be using hyper for any HTTP/1 purpose, including as a client or server, and consumers must send requests or responses that specify a chunk size greater than 18 exabytes. For a possible request smuggling attack to be possible, any upstream proxies must accept a chunk size greater than 64 bits.

References

Affected packages

crates.io / hyper

Package

Name: hyper; View open source insights on deps.dev
Purl: pkg:cargo/hyper

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-0

Fixed

0.14.10

Ecosystem specific

{
    "affected_functions": null,
    "affects": {
        "os": [],
        "functions": [],
        "arch": []
    }
}

Database specific

{
    "cvss": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
    "informational": null,
    "categories": []
}