RUSTSEC-2019-0013

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Source

https://rustsec.org/advisories/RUSTSEC-2019-0013

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2019-0013.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2019-0013

Aliases

Published

2019-08-27T12:00:00Z

Modified

2023-11-08T04:01:16.038525Z

Severity

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

Summary

Wrong memory orderings in RwLock potentially violates mutual exclusion

Details

Wrong memory orderings inside the RwLock implementation allow for two writers to acquire the lock at the same time. The drop implementation used Ordering::Relaxed, which allows the compiler or CPU to reorder a mutable access on the locked data after the lock has been yielded.

Only users of the RwLock implementation are affected. Users of Once (including users of lazy_static with the spin_no_std feature enabled) are NOT affected.

On strongly ordered CPU architectures like x86, the only real way that this would lead to a memory corruption is if the compiler reorders an access after the lock is yielded, which is possible but in practice unlikely. It is a more serious issue on weakly ordered architectures such as ARM which, except in the presence of certain instructions, allow the hardware to decide which accesses are seen at what times. Therefore on an ARM system it is likely that using the wrong memory ordering would result in a memory corruption, even if the compiler itself doesn't reorder the memory accesses in a buggy way.

The flaw was corrected by https://github.com/mvdnes/spin-rs/pull/66.

Database specific

{
    "license": "CC0-1.0"
}

References

Affected packages

crates.io / spin

Package

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

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-0

Fixed

0.5.2

Ecosystem specific

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

Database specific

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