GHSA-43w2-9j62-hq99

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    GHSA-43w2-9j62-hq99

    Published: 24 May 2022Last Modified: 8 Nov 2023

    Summary: Buffer overflow in SmallVec::insert_many

    Details: A bug in the SmallVec::insert_many method caused it to allocate a buffer that was smaller than needed. It then wrote past the end of the buffer, causing a buffer overflow and memory corruption on the heap. This bug was only triggered if the iterator passed to insert_many yielded more items than the lower bound returned from its size_hint method. The flaw was corrected in smallvec 0.6.14 and 1.6.1, by ensuring that additional space is always reserved for each item inserted. The fix also simplified the implementation of insert_many to use less unsafe code, so it is easier to verify its correctness.

    References: https://nvd.nist.gov/vuln/detail/CVE-2021-25900, https://github.com/servo/rust-smallvec/issues/252, https://github.com/servo/rust-smallvec/commit/5757ac500d4e544485d796b542e4e589749c291b, https://github.com/servo/rust-smallvec/commit/9998ba0694a6b51aa6604748b00b6a98f0a0039e, https://github.com/servo/rust-smallvec, https://rustsec.org/advisories/RUSTSEC-2021-0003.html

    Affected packages

    Package

    Name: smallvec

    Purl: pkg:cargo/smallvec

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0.6.3
    Fixed -0.6.14

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    GHSA-43w2-9j62-hq99 | CVE-DB