Design/Logic Flaw

2019-01-1620:29:00

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7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7.4 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.087 Low

EPSS

Percentile

94.3%

JSON

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.

CPENameOperatorVersion
ubuntu_linuxeq16.04
ubuntu_linuxeq14.04
ubuntu_linuxeq17.10
debian_linuxeq8.0
debian_linuxeq7.0
debian_linuxeq9.0
dhcpeq4.1esv r3b1
dhcpeq4.1-esv r3
dhcpeq4.1esv r5rc2
dhcpeq4.1-esv r12

Name	Operator	Version
ubuntu_linux	eq	16.04
ubuntu_linux	eq	14.04
ubuntu_linux	eq	17.10
debian_linux	eq	8.0
debian_linux	eq	7.0
debian_linux	eq	9.0
dhcp	eq	4.1esv r3b1
dhcp	eq	4.1-esv r3
dhcp	eq	4.1esv r5rc2
dhcp	eq	4.1-esv r12