UBUNTU-CVE-2020-11076

    Dashboard / Vulnerabilities / UBUNTU-CVE-2020-11076

    UBUNTU-CVE-2020-11076

    Published: 22 May 2020Last Modified: 4 Feb 2026
    Upstream:
    CVE-2020-11076
    Aliases:
    USN-6682-1

    Summary:

    Details: In Puma (RubyGem) before 4.3.4 and 3.12.5, an attacker could smuggle an HTTP response, by using an invalid transfer-encoding header. The problem has been fixed in Puma 3.12.5 and Puma 4.3.4.

    References: https://ubuntu.com/security/CVE-2020-11076, https://github.com/puma/puma/security/advisories/GHSA-x7jg-6pwg-fx5h, https://github.com/puma/puma/commit/f24d5521295a2152c286abb0a45a1e1e2bd275bd, https://github.com/puma/puma/blob/master/History.md#434435-and-31253126--2020-05-22, https://ubuntu.com/security/notices/USN-6682-1, https://www.cve.org/CVERecord?id=CVE-2020-11076

    Affected packages

    Package

    Name: puma

    Purl: pkg:deb/ubuntu/[email protected]+esm1?arch=source&distro=esm-apps/focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.12.4-1ubuntu2+esm1

    Affected versions

    3.12.0-2ubuntu1
    3.12.0-4ubuntu1
    3.12.4-1ubuntu2

    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-2020-11076 | CVE-DB