UBUNTU-CVE-2020-13950

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    UBUNTU-CVE-2020-13950

    Published: 10 Jun 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2020-13950
    Aliases:
    USN-4994-1

    Summary:

    Details: Apache HTTP Server versions 2.4.41 to 2.4.46 mod_proxy_http can be made to crash (NULL pointer dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers, leading to a Denial of Service

    References: https://ubuntu.com/security/CVE-2020-13950, https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-13950, https://lists.apache.org/thread.html/rbe197409ae4a58b629fb792d1aed541ccbbf865121a80e1c5938d223@%3Cannounce.httpd.apache.org%3E, http://www.openwall.com/lists/oss-security/2021/06/10/4, https://ubuntu.com/security/notices/USN-4994-1, https://www.cve.org/CVERecord?id=CVE-2020-13950

    Affected packages

    Package

    Name: apache2

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.4.41-4ubuntu3.3

    Affected versions

    2.4.41-1ubuntu1
    2.4.41-4ubuntu1
    2.4.41-4ubuntu2
    2.4.41-4ubuntu3
    2.4.41-4ubuntu3.1

    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-2020-13950 | CVE-DB