UBUNTU-CVE-2017-17448

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    UBUNTU-CVE-2017-17448

    Published: 6 Dec 2017Last Modified: 22 Apr 2026
    Upstream:
    CVE-2017-17448
    Aliases:
    USN-3617-1
    USN-3617-2
    USN-3617-3

    Summary:

    Details: net/netfilter/nfnetlink_cthelper.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability for new, get, and del operations, which allows local users to bypass intended access restrictions because the nfnl_cthelper_list data structure is shared across all net namespaces.

    References: https://ubuntu.com/security/CVE-2017-17448, https://patchwork.kernel.org/patch/10089373/, https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf.git/commit/?id=4b380c42f7d00a395feede754f0bc2292eebe6e5, https://ubuntu.com/security/notices/USN-3617-1, https://ubuntu.com/security/notices/USN-3617-2, https://ubuntu.com/security/notices/USN-3617-3, https://ubuntu.com/security/notices/USN-3619-1, https://ubuntu.com/security/notices/USN-3620-1, https://ubuntu.com/security/notices/USN-3620-2, https://ubuntu.com/security/notices/USN-3619-2, https://ubuntu.com/security/notices/USN-3632-1, https://www.cve.org/CVERecord?id=CVE-2017-17448

    Affected packages

    Package

    Name: linux

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.13.0-144.193

    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