UBUNTU-CVE-2018-11763

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    UBUNTU-CVE-2018-11763

    Published: 25 Sept 2018Last Modified: 22 Apr 2026
    Upstream:
    CVE-2018-11763
    Aliases:
    USN-3783-1

    Summary:

    Details: In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time without any connection timeout coming to effect. This affects only HTTP/2 connections. A possible mitigation is to not enable the h2 protocol.

    References: https://ubuntu.com/security/CVE-2018-11763, http://www.securitytracker.com/id/1041713, https://httpd.apache.org/security/vulnerabilities_24.html, https://ubuntu.com/security/notices/USN-3783-1, https://www.cve.org/CVERecord?id=CVE-2018-11763

    Affected packages

    Package

    Name: apache2

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.4.29-1ubuntu4.4

    Affected versions

    2.4.27-2ubuntu3
    2.4.29-1ubuntu1
    2.4.29-1ubuntu2
    2.4.29-1ubuntu3
    2.4.29-1ubuntu4
    2.4.29-1ubuntu4.1
    2.4.29-1ubuntu4.2
    2.4.29-1ubuntu4.3

    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