CVE-2013-0176

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    CVE-2013-0176

    Published: 5 Feb 2013Last Modified: 10 Apr 2026

    Summary:

    Details: The publickey_from_privatekey function in libssh before 0.5.4, when no algorithm is matched during negotiations, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a "Client: Diffie-Hellman Key Exchange Init" packet.

    References: http://secunia.com/advisories/51982, http://www.libssh.org/2013/01/22/libssh-0-5-4-security-release/, http://www.ubuntu.com/usn/USN-1707-1, http://www.libssh.org/2013/01/22/libssh-0-5-4-security-release/, http://lists.fedoraproject.org/pipermail/package-announce/2013-February/098065.html, http://lists.fedoraproject.org/pipermail/package-announce/2013-February/098094.html, https://exchange.xforce.ibmcloud.com/vulnerabilities/81595

    Affected packages

    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