RUSTSEC-2020-0123

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Source

https://rustsec.org/advisories/RUSTSEC-2020-0123

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2020-0123.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2020-0123

Aliases

CVE-2020-36443
GHSA-gvcp-948f-8f2p

Published

2020-01-24T12:00:00Z

Modified

2023-11-08T04:03:45.145642Z

Severity

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

Summary

Contents of uninitialized memory exposed in DeflateOutput's AsyncRead implementation

Details

Affected versions of this crate passes an uninitialized buffer to a user-provided trait function AsyncRead::poll_read().

Arbitrary AsyncRead::poll_read() implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.

The flaw was fixed in commit 5ba266a by ensuring the newly allocated part of the buffer is zero-initialized before passing it to a user-provided AsyncRead::poll_read().

Database specific

{
    "license": "CC0-1.0"
}

References

Affected packages

crates.io / libp2p-deflate

Package

Name: libp2p-deflate; View open source insights on deps.dev
Purl: pkg:cargo/libp2p-deflate

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-0

Fixed

0.27.1

Ecosystem specific

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

Database specific

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