UBUNTU-CVE-2018-5732

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    UBUNTU-CVE-2018-5732

    Published: 1 Mar 2018Last Modified: 22 Apr 2026
    Upstream:
    CVE-2018-5732

    Summary:

    Details: Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0

    References: https://ubuntu.com/security/CVE-2018-5732, https://kb.isc.org/article/AA-01565/75/CVE-2018-5732, https://ubuntu.com/security/notices/USN-3586-1, https://ubuntu.com/security/notices/USN-3586-2, https://www.cve.org/CVERecord?id=CVE-2018-5732

    Affected packages

    Package

    Name: isc-dhcp

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.2.4-7ubuntu12.12

    Affected versions

    4.2.4-7ubuntu8
    4.2.4-7ubuntu9
    4.2.4-7ubuntu10
    4.2.4-7ubuntu11
    4.2.4-7ubuntu12
    4.2.4-7ubuntu12.1
    4.2.4-7ubuntu12.2
    4.2.4-7ubuntu12.3
    4.2.4-7ubuntu12.4
    4.2.4-7ubuntu12.5
    4.2.4-7ubuntu12.6
    4.2.4-7ubuntu12.7
    4.2.4-7ubuntu12.8
    4.2.4-7ubuntu12.9
    4.2.4-7ubuntu12.10

    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