RUSTSEC-2019-0010

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Source

https://rustsec.org/advisories/RUSTSEC-2019-0010

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2019-0010.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2019-0010

Aliases

Published

2019-07-04T12:00:00Z

Modified

2023-11-08T04:01:14.223693Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

MultiDecoder::read() drops uninitialized memory of arbitrary type on panic in client code

Details

Affected versions of libflate have set a field of an internal structure with a generic type to an uninitialized value in MultiDecoder::read() and reverted it to the original value after the function completed. However, execution of MultiDecoder::read() could be interrupted by a panic in caller-supplied Read implementation. This would cause drop() to be called on uninitialized memory of a generic type implementing Read.

This is equivalent to a use-after-free vulnerability and could allow an attacker to gain arbitrary code execution.

The flaw was corrected by aborting immediately instead of unwinding the stack in case of panic within MultiDecoder::read(). The issue was discovered and fixed by Shnatsel.

Database specific

{
    "license": "CC0-1.0"
}

References

Affected packages

crates.io / libflate

Package

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

Affected ranges

Type: SEMVER
Events: Introduced

0.1.14

Fixed

0.1.25

Ecosystem specific

{
    "affected_functions": null,
    "affects": {
        "os": [],
        "functions": [
            "libflate::gzip::MultiDecoder::read"
        ],
        "arch": []
    }
}

Database specific

{
    "cvss": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "informational": null,
    "categories": []
}