RUSTSEC-2021-0012

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Source

https://rustsec.org/advisories/RUSTSEC-2021-0012

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2021-0012.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2021-0012

Aliases

Published

2021-01-02T12:00:00Z

Modified

2023-11-08T04:05:20.783188Z

Severity

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

Summary

Reading uninitialized memory can cause UB (`Deserializer::read_vec`)

Details

Deserializer::read_vec() created an uninitialized buffer and passes it to a user-provided Read implementation (Deserializer.reader.read_exact()).

Passing an uninitialized buffer to an arbitrary Read implementation is currently defined as undefined behavior in Rust. Official documentation for the Read trait explains the following: "It is your responsibility to make sure that buf is initialized before calling read. Calling read with an uninitialized buf (of the kind one obtains via MaybeUninit<T>) is not safe, and can lead to undefined behavior."

The flaw was corrected in commit ce310f7 by zero-initializing the newly allocated buffer before handing it to Deserializer.reader.read_exact().

Database specific

{
    "license": "CC0-1.0"
}

References

Affected packages

crates.io / cdr

Package

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

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-0

Fixed

0.2.4

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:H/I:H/A:H",
    "informational": null,
    "categories": [
        "memory-exposure"
    ]
}