CVE-2018-5733

Severity CVSS v4.0:

Pending analysis

Type:

CWE-190 Integer Overflow or Wraparound

Publication date:

16/01/2019

Last modified:

25/04/2025

Description

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

Vector 2.0

AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0

5.00

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:isc:dhcp::::::::	4.2.0 (including)	4.2.8 (including)
cpe:2.3:a:isc:dhcp::::::::	4.3.0 (including)	4.3.6 (including)
cpe:2.3:a:isc:dhcp:4.1-esv:-::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r10::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r10_b1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r10_rc1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r11::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r11_b1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc2::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r12::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r12_b1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r12_p1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r13::::::

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:a:isc:dhcp::::::::	4.2.0 (including)	4.2.8 (including)
cpe:2.3:a:isc:dhcp::::::::	4.3.0 (including)	4.3.6 (including)
cpe:2.3:a:isc:dhcp:4.1-esv:-::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r10::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r10_b1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r10_rc1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r11::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r11_b1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc2::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r12::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r12_b1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r12_p1::::::
cpe:2.3:a:isc:dhcp:4.1-esv:r13::::::

CVE-2018-5733

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools