UBUNTU-CVE-2015-8023

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    UBUNTU-CVE-2015-8023

    Published: 16 Nov 2015Last Modified: 4 Feb 2026
    Upstream:
    CVE-2015-8023
    Aliases:
    USN-2811-1

    Summary:

    Details: The server implementation of the EAP-MSCHAPv2 protocol in the eap-mschapv2 plugin in strongSwan 4.2.12 through 5.x before 5.3.4 does not properly validate local state, which allows remote attackers to bypass authentication via an empty Success message in response to an initial Challenge message.

    References: https://ubuntu.com/security/CVE-2015-8023, https://www.strongswan.org/blog/2015/11/16/strongswan-5.3.4-released.html, https://ubuntu.com/security/notices/USN-2811-1, https://www.cve.org/CVERecord?id=CVE-2015-8023

    Affected packages

    Package

    Name: strongswan

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -5.1.2-0ubuntu2.4

    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