UBUNTU-CVE-2022-41556

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    UBUNTU-CVE-2022-41556

    Published: 6 Oct 2022Last Modified: 22 Apr 2026
    Upstream:
    CVE-2022-41556
    Aliases:
    USN-5903-1

    Summary:

    Details: A resource leak in gw_backend.c in lighttpd 1.4.56 through 1.4.66 could lead to a denial of service (connection-slot exhaustion) after a large amount of anomalous TCP behavior by clients. It is related to RDHUP mishandling in certain HTTP/1.1 chunked situations. Use of mod_fastcgi is, for example, affected. This is fixed in 1.4.67.

    References: https://ubuntu.com/security/CVE-2022-41556, https://github.com/lighttpd/lighttpd1.4/pull/115, https://ubuntu.com/security/notices/USN-5903-1, https://www.cve.org/CVERecord?id=CVE-2022-41556

    Affected packages

    Package

    Name: lighttpd

    Purl: pkg:deb/ubuntu/[email protected]+nmu2ubuntu2.1+esm1?arch=source&distro=esm-infra-legacy/trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.4.31-3ubuntu3
    1.4.33-1ubuntu1
    1.4.33-1+nmu2ubuntu1
    1.4.33-1+nmu2ubuntu2
    1.4.33-1+nmu2ubuntu2.1
    1.4.33-1+nmu2ubuntu2.1+esm1

    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-2022-41556 | CVE-DB