PT-2024-1152 · Juniper Networks · Junos

Published

2024-01-10

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Updated

2024-01-18

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CVE-2023-36842

CVSS v3.1

6.5

Medium

VectorAV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Name of the Vulnerable Software and Affected Versions Juniper Networks Junos OS versions prior to 20.4R3-S9 Juniper Networks Junos OS version 21.2 versions prior to 21.2R3-S7 Juniper Networks Junos OS version 21.3 versions prior to 21.3R3-S5 Juniper Networks Junos OS version 21.4 versions prior to 21.4R3-S5 Juniper Networks Junos OS version 22.1 versions prior to 22.1R3-S4 Juniper Networks Junos OS version 22.2 versions prior to 22.2R3-S3 Juniper Networks Junos OS version 22.3 versions prior to 22.3R3-S2 Juniper Networks Junos OS version 22.4 versions prior to 22.4R2-S2, 22.4R3 Juniper Networks Junos OS version 23.2 versions prior to 23.2R2
Description An Improper Check for Unusual or Exceptional Conditions issue in the Juniper DHCP Daemon (jdhcpd) of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause the jdhcpd to consume all the CPU cycles, resulting in a Denial of Service (DoS). On Junos OS devices with forward-snooped-client configured, if an attacker sends a specific DHCP packet to a non-configured interface, this will cause an infinite loop. The DHCP process will have to be restarted to recover the service.
Recommendations For versions prior to 20.4R3-S9, update to version 20.4R3-S9 or later. For version 21.2, update to version 21.2R3-S7 or later. For version 21.3, update to version 21.3R3-S5 or later. For version 21.4, update to version 21.4R3-S5 or later. For version 22.1, update to version 22.1R3-S4 or later. For version 22.2, update to version 22.2R3-S3 or later. For version 22.3, update to version 22.3R3-S2 or later. For version 22.4, update to version 22.4R2-S2, 22.4R3 or later. For version 23.2, update to version 23.2R2 or later.

Fix

DoS

Improper Handling of Exceptional Conditions

Weakness Enumeration

CWE-755CWE-703

Related Identifiers

BDU:2024-00473
CVE-2023-36842

Affected Products

Junos