RUSTSEC-2024-0426

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Source

https://rustsec.org/advisories/RUSTSEC-2024-0426

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2024-0426.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2024-0426

Published

2024-12-19T12:00:00Z

Modified

2024-12-22T09:01:06Z

Summary

Unsound usages of `u8` type casting

Details

The library provides a safe public API unpack to cast u8 array to arbitrary types, which can cause to undefined behaviors. The length check of array can only prevent out-of-bound access on the return type. However, it can't prevent misaligned pointer when casting u8 pointer to a type aligned to larger bytes. For example, if we assign u16 to T, misaligned raw pointer dereference could happen and cause to panic. Even if we pass the type aligned to same byte as u8 (e.g., bool), it could construct a illegal type since bool can only have 0 or 1 as bit patterns, which is also an undefined behavior. The further exploits of the bug here are still not clear, so we would report this issue as unsound.

The details of PoC to reproduce undefined behavior are provided in the issue.

Database specific

{
    "license": "CC0-1.0"
}

References

Affected packages

crates.io / spl-token-swap

Package

Name: spl-token-swap; View open source insights on deps.dev
Purl: pkg:cargo/spl-token-swap

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-0

Ecosystem specific

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

Database specific

{
    "cvss": null,
    "informational": "unsound",
    "categories": []
}