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cell-project

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1 actionable advisory, newest first. Withdrawn advisories and news are excluded. Coverage is partial.

  1. Unratedcrates.ioPublished

    cell-project used incorrect variance when projecting through &Cell

    GHSA-p75v-367r-2v23

    Affected
    • crates.io cell-project < 0.1.4
    Fixed in
    0.1.4· Vendor fix available
    Issue
    The issue lies in the implementation of the cellproject macro which used field as const instead of field as mut . The problem being that const T is covariant in T while mut T is invariant in T. Keep in mind that &Cell<T is invariant in T, so casting to const T relaxed the variance, and lead to unsoundness, as shown in the example below. MIRI error Affected Versions All versions of the cell-project crate before 0.1.4 are affected. Mitigation This was fixed in [Issues/4], and released as version 0.1.4. So just updating to the latest version will include the fix (which may result in a compile error on unsound usage). Acknowledgements This was discovered and fixed by @SoniEx2 in cell-project: [Issues/3] and [Issues/4] [issues/3]: https://github.com/RustyYato/cell-project/issues/3 [issues/4]: https://github.com/RustyYato/cell-project/issues/4

    Recommended action: Upgrade to 0.1.4 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:github.comSource checked Evidence →