RUSTSEC-2021-0055

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Source

https://rustsec.org/advisories/RUSTSEC-2021-0055

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2021-0055.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2021-0055

Aliases

Published

2021-05-01T12:00:00Z

Modified

2023-12-06T01:01:17.417863Z

Severity

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

Summary

NULL pointer deref in signature_algorithms processing

Details

An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signaturealgorithms extension (where it was present in the initial ClientHello), but includes a signaturealgorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack.

A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue.

References

Affected packages

crates.io / openssl-src

Package

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

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-0

Fixed

111.15.0

Ecosystem specific

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

Database specific

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