Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2016-2774

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
09/03/2016
Last modified:
12/04/2025

Description

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.90 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x
5.90
Severity 3.x
MEDIUM
Vector 2.0
AV:N/AC:M/Au:N/C:N/I:N/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C

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

Base Score 2.0
7.10
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
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: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:r2:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.1-esv:r3:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.1-esv:r3_b1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.1-esv:r4:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.1-esv:r5:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.1-esv:r5_b1:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools