UBUNTU-CVE-2025-27773

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    UBUNTU-CVE-2025-27773

    Published: 11 Mar 2025Last Modified: 15 Sept 2026
    Upstream:
    CVE-2025-27773
    Aliases:
    USN-8770-1

    Summary:

    Details: The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. Prior to versions 4.17.0 and 5.0.0-alpha.20, there is a signature confusion attack in the HTTPRedirect binding. An attacker with any signed SAMLResponse via the HTTP-Redirect binding can cause the application to accept an unsigned message. Versions 4.17.0 and 5.0.0-alpha.20 contain a fix for the issue.

    References: https://ubuntu.com/security/CVE-2025-27773, https://www.cve.org/CVERecord?id=CVE-2025-27773, https://github.com/simplesamlphp/saml2/security/advisories/GHSA-46r4-f8gj-xg56, https://github.com/simplesamlphp/saml2/commit/7867d6099dc7f31bed1ea10e5bea159c5623d2a0, https://github.com/simplesamlphp/saml2/blob/9545abd0d9d48388f2fa00469c5c1e0294f0303e/src/SAML2/HTTPRedirect.php#L104-L113, https://github.com/simplesamlphp/saml2/blob/9545abd0d9d48388f2fa00469c5c1e0294f0303e/src/SAML2/HTTPRedirect.php#L178-L217, https://ubuntu.com/security/notices/USN-8770-1

    Affected packages

    Package

    Name: simplesamlphp

    Purl: pkg:deb/ubuntu/simplesamlphp?arch=source&distro=esm-apps-legacy%2Fxenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.14.0-1ubuntu2+esm1

    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
    UBUNTU-CVE-2025-27773 | CVE-DB