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    CVE-2018-5733

    A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0.

    Published:Feb 28, 2018
    Last Modified:Apr 25, 2025
    EPS:Jan 16, 2019
    EPSS Score:0.29514
    CVSS Score:7.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Isc
    Product
    Dhcp
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Server Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Eus
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-190 Integer Overflow or Wraparound

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

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    References

    http://www.securityfocus.com/bid/103188
    http://www.securitytracker.com/id/1040437
    https://access.redhat.com/errata/RHSA-2018:0469
    https://access.redhat.com/errata/RHSA-2018:0483
    https://kb.isc.org/docs/aa-01567
    https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html
    https://usn.ubuntu.com/3586-1/
    https://usn.ubuntu.com/3586-2/
    https://www.debian.org/security/2018/dsa-4133
    http://www.securityfocus.com/bid/103188
    http://www.securitytracker.com/id/1040437
    https://access.redhat.com/errata/RHSA-2018:0469
    https://access.redhat.com/errata/RHSA-2018:0483
    https://kb.isc.org/docs/aa-01567
    https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html
    https://security.netapp.com/advisory/ntap-20250425-0010/
    https://usn.ubuntu.com/3586-1/
    https://usn.ubuntu.com/3586-2/
    https://www.debian.org/security/2018/dsa-4133

    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