UBUNTU-CVE-2020-25613

    Dashboard / Vulnerabilities / UBUNTU-CVE-2020-25613

    UBUNTU-CVE-2020-25613

    Published: 6 Oct 2020Last Modified: 22 Apr 2026
    Upstream:
    CVE-2020-25613
    Aliases:
    USN-4882-1

    Summary:

    Details: An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy (which also has a poor header check), which may lead to an HTTP Request Smuggling attack.

    References: https://ubuntu.com/security/CVE-2020-25613, https://www.ruby-lang.org/en/news/2020/09/29/http-request-smuggling-cve-2020-25613/, https://ubuntu.com/security/notices/USN-4882-1, https://www.cve.org/CVERecord?id=CVE-2020-25613

    Affected packages

    Package

    Name: ruby2.3

    Purl: pkg:deb/ubuntu/[email protected]~ubuntu16.04.15?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.3.1-2~ubuntu16.04.15

    Affected versions

    2.3.0-1
    2.3.0-2
    2.3.0-4ubuntu2
    2.3.0-4ubuntu3
    2.3.0-5ubuntu1
    2.3.1-2~16.04
    2.3.1-2~16.04.2
    2.3.1-2~16.04.4
    2.3.1-2~16.04.5
    2.3.1-2~16.04.6
    2.3.1-2~16.04.7
    2.3.1-2~16.04.9
    2.3.1-2~16.04.10
    2.3.1-2~16.04.11
    2.3.1-2~16.04.12
    2.3.1-2~ubuntu16.04.13
    2.3.1-2~ubuntu16.04.14

    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-2020-25613 | CVE-DB