UBUNTU-CVE-2013-4563

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    UBUNTU-CVE-2013-4563

    Published: 20 Nov 2013Last Modified: 4 Feb 2026
    Upstream:
    CVE-2013-4563

    Summary:

    Details: The udp6_ufo_fragment function in net/ipv6/udp_offload.c in the Linux kernel through 3.12, when UDP Fragmentation Offload (UFO) is enabled, does not properly perform a certain size comparison before inserting a fragment header, which allows remote attackers to cause a denial of service (panic) via a large IPv6 UDP packet, as demonstrated by use of the Token Bucket Filter (TBF) queueing discipline.

    References: https://ubuntu.com/security/CVE-2013-4563, https://github.com/torvalds/linux/commit/0e033e04c2678dbbe74a46b23fffb7bb918c288e, http://www.openwall.com/lists/oss-security/2013/11/13/9, http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0e033e04c2678dbbe74a46b23fffb7bb918c288e, https://bugzilla.redhat.com/show_bug.cgi?id=1030015, https://ubuntu.com/security/notices/USN-2113-1, https://ubuntu.com/security/notices/USN-2117-1, https://www.cve.org/CVERecord?id=CVE-2013-4563

    Affected packages

    Package

    Name: linux

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.12.0-7.15

    Affected versions

    3.11.0-12.19

    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