UBUNTU-CVE-2018-14773

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    UBUNTU-CVE-2018-14773

    Published: 3 Aug 2018Last Modified: 24 Oct 2025
    Upstream:
    CVE-2018-14773

    Summary:

    Details: An issue was discovered in Http Foundation in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. It arises from support for a (legacy) IIS header that lets users override the path in the request URL via the X-Original-URL or X-Rewrite-URL HTTP request header. These headers are designed for IIS support, but it's not verified that the server is in fact running IIS, which means anybody who can send these requests to an application can trigger this. This affects \Symfony\Component\HttpFoundation\Request::prepareRequestUri() where X-Original-URL and X_REWRITE_URL are both used. The fix drops support for these methods so that they cannot be used as attack vectors such as web cache poisoning.

    References: https://ubuntu.com/security/CVE-2018-14773, https://symfony.com/blog/cve-2018-14773-remove-support-for-legacy-and-risky-http-headers, https://www.cve.org/CVERecord?id=CVE-2018-14773

    Affected packages

    Package

    Name: symfony

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2.7.1+dfsg-1
    2.7.5+dfsg-1
    2.7.9+dfsg-1
    2.7.9+dfsg-1ubuntu2
    2.7.10-0ubuntu2

    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-2018-14773 | CVE-DB