UBUNTU-CVE-2017-18122

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    UBUNTU-CVE-2017-18122

    Published: 2 Feb 2018Last Modified: 24 Oct 2025
    Upstream:
    CVE-2017-18122

    Summary:

    Details: A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16. A SimpleSAMLphp Service Provider using SAML 1.1 will regard as valid any unsigned SAML response containing more than one signed assertion, provided that the signature of at least one of the assertions is valid. Attributes contained in all the assertions received will be merged and the entityID of the first assertion received will be used, allowing an attacker to impersonate any user of any IdP given an assertion signed by the targeted IdP.

    References: https://ubuntu.com/security/CVE-2017-18122, https://simplesamlphp.org/security/201710-01, https://github.com/simplesamlphp/simplesamlphp/commit/e2d53086abbb253efb24ddcb49b116246eb0b6ca, https://www.cve.org/CVERecord?id=CVE-2017-18122

    Affected packages

    Package

    Name: simplesamlphp

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.13.2-1

    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