USN-5090-2

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    USN-5090-2

    Published: 27 Sept 2021Last Modified: 29 Jun 2026

    Summary: apache2 vulnerabilities

    Details: USN-5090-1 fixed several vulnerabilities in Apache. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. Original advisory details: It was discovered that the Apache HTTP Server incorrectly handled certain malformed requests. A remote attacker could possibly use this issue to cause the server to crash, resulting in a denial of service. (CVE-2021-34798) It was discovered that the Apache HTTP Server incorrectly handled escaping quotes. If the server was configured with third-party modules, a remote attacker could use this issue to cause the server to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-39275) It was discovered that the Apache mod_proxy module incorrectly handled certain request uri-paths. A remote attacker could possibly use this issue to cause the server to forward requests to arbitrary origin servers. (CVE-2021-40438)

    References: https://ubuntu.com/security/notices/USN-5090-2, https://ubuntu.com/security/CVE-2021-34798, https://ubuntu.com/security/CVE-2021-39275, https://ubuntu.com/security/CVE-2021-40438

    Affected packages

    Package

    Name: apache2

    Purl: pkg:deb/ubuntu/apache2?arch=source&distro=trusty%2Fesm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.4.7-1ubuntu4.22+esm2

    Affected versions

    2.4.6-2ubuntu2
    2.4.6-2ubuntu3
    2.4.6-2ubuntu4
    2.4.7-1ubuntu1
    2.4.7-1ubuntu2
    2.4.7-1ubuntu3
    2.4.7-1ubuntu4
    2.4.7-1ubuntu4.1
    2.4.7-1ubuntu4.4
    2.4.7-1ubuntu4.5
    2.4.7-1ubuntu4.6
    2.4.7-1ubuntu4.7
    2.4.7-1ubuntu4.8
    2.4.7-1ubuntu4.9
    2.4.7-1ubuntu4.10
    2.4.7-1ubuntu4.11
    2.4.7-1ubuntu4.13
    2.4.7-1ubuntu4.15
    2.4.7-1ubuntu4.16
    2.4.7-1ubuntu4.17
    2.4.7-1ubuntu4.18
    2.4.7-1ubuntu4.19
    2.4.7-1ubuntu4.20
    2.4.7-1ubuntu4.21
    2.4.7-1ubuntu4.22
    2.4.7-1ubuntu4.22+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
    USN-5090-2 | CVE-DB