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    CVE-2016-10027

    Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required TLS setting has been set, allows man-in-the-middle attackers to bypass TLS protections and trigger use of cleartext for client authentication by stripping the "starttls" feature from a server response.

    Published:Nov 12, 2016
    Last Modified:Apr 20, 2025
    EPS:Jan 12, 2017
    EPSS Score:0.00388
    CVSS Score:5.9

    Affected Products

    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Igniterealtime
    Product
    Smack

    Exploits

    No exploit reference

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    References

    http://www.openwall.com/lists/oss-security/2016/12/22/12
    http://www.securityfocus.com/bid/95129
    https://community.igniterealtime.org/blogs/ignite/2016/11/22/smack-security-advisory-2016-11-22
    https://github.com/igniterealtime/Smack/commit/059ee99ba0d5ff7758829acf5a9aeede09ec820b
    https://github.com/igniterealtime/Smack/commit/a9d5cd4a611f47123f9561bc5a81a4555fe7cb04
    https://issues.igniterealtime.org/projects/SMACK/issues/SMACK-739
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J4WXAZ4JVJXHMEDDXJVWJHPVBF5QCTZF/
    http://www.openwall.com/lists/oss-security/2016/12/22/12
    http://www.securityfocus.com/bid/95129
    https://community.igniterealtime.org/blogs/ignite/2016/11/22/smack-security-advisory-2016-11-22
    https://github.com/igniterealtime/Smack/commit/059ee99ba0d5ff7758829acf5a9aeede09ec820b
    https://github.com/igniterealtime/Smack/commit/a9d5cd4a611f47123f9561bc5a81a4555fe7cb04
    https://issues.igniterealtime.org/projects/SMACK/issues/SMACK-739
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J4WXAZ4JVJXHMEDDXJVWJHPVBF5QCTZF/

    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