UBUNTU-CVE-2023-36672

    Dashboard / Vulnerabilities / UBUNTU-CVE-2023-36672

    UBUNTU-CVE-2023-36672

    Published: 9 Aug 2023Last Modified: 20 Jan 2026
    Upstream:
    CVE-2023-36672

    Summary:

    Details: An issue was discovered in the Clario VPN client through 5.9.1.1662 for macOS. The VPN client insecurely configures the operating system such that traffic to the local network is sent in plaintext outside the VPN tunnel even if the local network is using a non-RFC1918 IP subnet. This allows an adversary to trick the victim into sending arbitrary IP traffic in plaintext outside the VPN tunnel. NOTE: the tunnelcrack.mathyvanhoef.com website uses this CVE ID to refer more generally to "LocalNet attack resulting in leakage of traffic in plaintext" rather than to only Clario.

    References: https://ubuntu.com/security/CVE-2023-36672, https://tunnelcrack.mathyvanhoef.com/details.html, https://papers.mathyvanhoef.com/usenix2023-tunnelcrack.pdf, https://openvpn.net/security-advisory/statement-regarding-tunnelcrack-vulnerabilities/, https://www.softether.org/9-about/News/905-TunnelCrack, https://www.cve.org/CVERecord?id=CVE-2023-36672

    Affected packages

    Package

    Name: wireguard

    Purl: pkg:deb/ubuntu/[email protected]~16.04.2?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.0.20200513-1~16.04.1
    1.0.20200513-1~16.04.2

    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-2023-36672 | CVE-DB