USN-6657-1

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    USN-6657-1

    Published: 26 Feb 2024Last Modified: 27 Apr 2026

    Summary: dnsmasq vulnerabilities

    Details: Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered that Dnsmasq icorrectly handled validating DNSSEC messages. A remote attacker could possibly use this issue to cause Dnsmasq to consume resources, leading to a denial of service. (CVE-2023-50387) It was discovered that Dnsmasq incorrectly handled preparing an NSEC3 closest encloser proof. A remote attacker could possibly use this issue to cause Dnsmasq to consume resources, leading to a denial of service. (CVE-2023-50868) It was discovered that Dnsmasq incorrectly set the maximum EDNS.0 UDP packet size as required by DNS Flag Day 2020. This issue only affected Ubuntu 23.10. (CVE-2023-28450)

    References: https://ubuntu.com/security/notices/USN-6657-1, https://ubuntu.com/security/CVE-2023-28450, https://ubuntu.com/security/CVE-2023-50387, https://ubuntu.com/security/CVE-2023-50868

    Affected packages

    Package

    Name: dnsmasq

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.90-0ubuntu0.20.04.1

    Affected versions

    2.80-1ubuntu2

    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
    USN-6657-1 | CVE-DB