UBUNTU-CVE-2019-9518

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    UBUNTU-CVE-2019-9518

    Published: 13 Aug 2019Last Modified: 22 Apr 2026
    Upstream:
    CVE-2019-9518
    Aliases:
    USN-4866-1

    Summary:

    Details: Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service. The attacker sends a stream of frames with an empty payload and without the end-of-stream flag. These frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends time processing each frame disproportionate to attack bandwidth. This can consume excess CPU.

    References: https://ubuntu.com/security/CVE-2019-9518, https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md, https://netty.io/news/2019/08/13/4-1-39-Final.html, https://github.com/netty/netty/pull/9461, https://ubuntu.com/security/notices/USN-4866-1, https://www.cve.org/CVERecord?id=CVE-2019-9518

    Affected packages

    Package

    Name: netty

    Purl: pkg:deb/ubuntu/netty@1:4.1.7-4ubuntu0.1+esm1?arch=source&distro=esm-apps/bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:4.1.7-4ubuntu0.1+esm1

    Affected versions

    1:4.1.7-4
    1:4.1.7-4ubuntu0.1~esm1
    1:4.1.7-4ubuntu0.1

    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
    UBUNTU-CVE-2019-9518 | CVE-DB