CVE-2012-2663

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    CVE-2012-2663

    Published: 15 Feb 2014Last Modified: 10 Apr 2026

    Summary:

    Details: extensions/libxt_tcp.c in iptables through 1.4.21 does not match TCP SYN+FIN packets in --syn rules, which might allow remote attackers to bypass intended firewall restrictions via crafted packets. NOTE: the CVE-2012-6638 fix makes this issue less relevant.

    References: http://www.spinics.net/lists/netfilter-devel/msg21248.html, https://bugzilla.redhat.com/show_bug.cgi?id=826702, http://www.spinics.net/lists/netfilter-devel/msg21248.html, https://bugzilla.redhat.com/show_bug.cgi?id=826702, https://bugzilla.redhat.com/show_bug.cgi?id=826702

    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