An Improper Input Validation vulnerability in the active-lease query portion in JDHCPD's DHCP Relay Agent of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) by sending a crafted DHCP packet to the device thereby crashing the jdhcpd DHCP service. This is typically configured for Broadband Subscriber Sessions. Continued receipt and processing of this crafted packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS: 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2. This issue does not affect Junos OS Evolved.

Published at
2021-04-22
269 days ago
Modified
2021-04-22
269 days ago
2021
Year
The year of the turtle

https://kb.juniper.net/JSA11158

MISC:https://kb.juniper.net/JSA11158

https://www.juniper.net/documentation/us/en/software/junos/subscriber-mgmt-sessions/topics/ref/statement/active-leasequery-edit-forwarding-options.html

MISC:https://www.juniper.net/documentation/us/en/software/junos/subscriber-mgmt-sessions/topics/ref/statement/active-leasequery-edit-forwarding-options.html

Vulnerability RAW

{
	"Title": {
		"_text": "CVE-2021-0267"
	},
	"Notes": {
		"Note": [
			{
				"_text": "An Improper Input Validation vulnerability in the active-lease query portion in JDHCPD's DHCP Relay Agent of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) by sending a crafted DHCP packet to the device thereby crashing the jdhcpd DHCP service. This is typically configured for Broadband Subscriber Sessions. Continued receipt and processing of this crafted packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS: 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2. This issue does not affect Junos OS Evolved."
			},
			{
				"_text": "2021-04-22"
			},
			{
				"_text": "2021-04-22"
			}
		]
	},
	"CVE": {
		"_text": "CVE-2021-0267"
	},
	"References": {
		"Reference": [
			{
				"URL": {
					"_text": "https://kb.juniper.net/JSA11158"
				},
				"Description": {
					"_text": "MISC:https://kb.juniper.net/JSA11158"
				}
			},
			{
				"URL": {
					"_text": "https://www.juniper.net/documentation/us/en/software/junos/subscriber-mgmt-sessions/topics/ref/statement/active-leasequery-edit-forwarding-options.html"
				},
				"Description": {
					"_text": "MISC:https://www.juniper.net/documentation/us/en/software/junos/subscriber-mgmt-sessions/topics/ref/statement/active-leasequery-edit-forwarding-options.html"
				}
			}
		]
	}
}