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CVE-2022-3786

CVE-2022-3786 · X.509 Email Address Variable Length Buffer Overflow

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed a malicious certificate or for an application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address in a certificate to overflow an arbitrary number of bytes containing the `.' character (decimal 46) on the stack. This buffer overflow could result in a crash (causing a denial of service). In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects.

CVSS 7.5 · High · EPSS 92.5% · Fix available

Published
Updated

Stack: system · network

Affected products and versions

  • openssl

    Versions
    • ≥ 3.0.0, < 3.0.7: Affected (semver)

    Update to 3.0.7

  • openssl Debian:12

    Affected ranges
    • ECOSYSTEM: < 3.0.7-1

    Update to 3.0.7-1

  • openssl Debian:13

    Affected ranges
    • ECOSYSTEM: < 3.0.7-1

    Update to 3.0.7-1

  • openssl Debian:14

    Affected ranges
    • ECOSYSTEM: < 3.0.7-1

    Update to 3.0.7-1

  • openssl Ubuntu:22.04:LTS

    Versions
    • 1.1.1l-1ubuntu1
    • 3.0.0-1ubuntu1
    • 3.0.1-0ubuntu1
    • 3.0.2-0ubuntu1
    • 3.0.2-0ubuntu1.1
    • 3.0.2-0ubuntu1.2
    • 3.0.2-0ubuntu1.4
    • 3.0.2-0ubuntu1.5
    • 3.0.2-0ubuntu1.6
    Affected ranges
    • ECOSYSTEM: < 3.0.2-0ubuntu1.7

    Update to 3.0.2-0ubuntu1.7

Original sources

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