CVE-2018-17204

    Dashboard / Vulnerabilities / CVE-2018-17204

    CVE-2018-17204

    Published: 19 Sept 2018Last Modified: 8 Jul 2026

    Summary:

    Details: An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6, affecting parse_group_prop_ntr_selection_method in lib/ofp-util.c. When decoding a group mod, it validates the group type and command after the whole group mod has been decoded. The OF1.5 decoder, however, tries to use the type and command earlier, when it might still be invalid. This causes an assertion failure (via OVS_NOT_REACHED). ovs-vswitchd does not enable support for OpenFlow 1.5 by default.

    References: https://access.redhat.com/errata/RHSA-2018:3500, https://access.redhat.com/errata/RHSA-2019:0053, https://access.redhat.com/errata/RHSA-2019:0081, https://lists.debian.org/debian-lts-announce/2021/02/msg00032.html, https://usn.ubuntu.com/3873-1/, https://github.com/openvswitch/ovs/commit/4af6da3b275b764b1afe194df6499b33d2bf4cde

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- c298ef781c2d35d939fe163cbc2f41ea7b1cb8d1
    Fixed -None

    Affected versions

    v2.7.6
    v2.7.5
    v2.7.4
    v2.7.3
    v2.7.2
    v2.7.1
    v2.7.0

    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