CVE-2018-6922

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    CVE-2018-6922

    Published: 9 Aug 2018Last Modified: 4 Jun 2024

    Summary:

    Details: One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system's network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost.

    References: http://www.securityfocus.com/bid/105058, http://www.securitytracker.com/id/1041425, https://security.netapp.com/advisory/ntap-20180815-0002/, https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc, https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html

    Affected packages

    Package

    Name: kfreebsd-10

    Purl: pkg:deb/debian/kfreebsd-10?arch=source

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    10.3~svn300087+ds1-1

    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