UBUNTU-CVE-2016-2774

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    UBUNTU-CVE-2016-2774

    Published: 9 Mar 2016Last Modified: 22 Apr 2026
    Upstream:
    CVE-2016-2774
    Aliases:
    USN-3586-1

    Summary:

    Details: ISC DHCP 4.1.x before 4.1-ESV-R13 and 4.2.x and 4.3.x before 4.3.4 does not restrict the number of concurrent TCP sessions, which allows remote attackers to cause a denial of service (INSIST assertion failure or request-processing outage) by establishing many sessions.

    References: https://ubuntu.com/security/CVE-2016-2774, https://kb.isc.org/article/AA-01354, https://ubuntu.com/security/notices/USN-3586-1, https://www.cve.org/CVERecord?id=CVE-2016-2774

    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