CVE-2021-0267: 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…

PriorityP428medium6.5CVSS 3.1

AVAACLPRNUINSUCNINAH

EPSS

0.47%

37.9th percentile

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.

Affected

9 ranges

Vendor	Product	Version range	Fixed in
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos_os	—	—
juniper_networks	junos_os	>= 19.4 < 19.4R3-S1	19.4R3-S1
juniper_networks	junos_os	>= 20.1 < 20.1R2-S1, 20.1R3	20.1R2-S1, 20.1R3
juniper_networks	junos_os	>= 20.2 < 20.2R3	20.2R3
juniper_networks	junos_os	>= 20.3 < 20.3R2	20.3R2

CVSS provenance

nvdv3.16.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvdv2.03.3LOWAV:A/AC:L/Au:N/C:N/I:N/A:P

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