UBUNTU-CVE-2015-4171

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    UBUNTU-CVE-2015-4171

    Published: 8 Jun 2015Last Modified: 4 Feb 2026
    Upstream:
    CVE-2015-4171
    Aliases:
    USN-2628-1

    Summary:

    Details: strongSwan 4.3.0 through 5.x before 5.3.2 and strongSwan VPN Client before 1.4.6, when using EAP or pre-shared keys for authenticating an IKEv2 connection, does not enforce server authentication restrictions until the entire authentication process is complete, which allows remote servers to obtain credentials by using a valid certificate and then reading the responses.

    References: https://ubuntu.com/security/CVE-2015-4171, http://www.openwall.com/lists/oss-security/2015/05/29/6, https://www.strongswan.org/blog/2015/06/08/strongswan-vulnerability-%28cve-2015-4171%29.html, https://ubuntu.com/security/notices/USN-2628-1, https://www.cve.org/CVERecord?id=CVE-2015-4171

    Affected packages

    Package

    Name: strongswan

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -5.1.2-0ubuntu2.3

    Affected versions

    4.6.4-9

    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