CVE-2020-1672 Information

Description

On Juniper Networks Junos OS devices configured with DHCPv6 relay enabled receipt of a specific DHCPv6 packet might crash the jdhcpd daemon. The jdhcpd daemon automatically restarts without intervention but continuous receipt of specific crafted DHCP messages will repeatedly crash jdhcpd leading to an extended Denial of Service (DoS) condition. Only DHCPv6 packet can trigger this issue. DHCPv4 packet cannot trigger this issue. This issue affects Juniper Networks Junos OS: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11 17.4R3-S2 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4 18.3R3-S3; 18.4 versions prior to 18.4R2-S5 18.4R3-S4; 19.1 versions prior to 19.1R2-S2 19.1R3-S2; 19.2 versions prior to 19.2R1-S5 19.2R2-S1 19.2R3; 19.3 versions prior to 19.3R2-S4 19.3R2-S4 19.3R3; 19.4 versions prior to 19.4R1-S3 19.4R2-S1 19.4R3; 20.1 versions prior to 20.1R1-S3 20.1R2.

CVSS Vector

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

Reference

https://kb.juniper.net/JSA11069

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5