PT-2021-12952 · Juniper Networks · Junos

Published 2021-04-22 · Updated 2021-07-23 · CVE-2021-0241

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Juniper Networks Junos OS versions prior to 17.3R3-S11 Juniper Networks Junos OS versions prior to 17.4R3-S4 Juniper Networks Junos OS versions prior to 18.1R3-S12 Juniper Networks Junos OS versions prior to 18.2R3-S7 Juniper Networks Junos OS versions prior to 18.3R3-S4 Juniper Networks Junos OS versions prior to 18.4R3-S7 Juniper Networks Junos OS versions prior to 19.1R3-S4 Juniper Networks Junos OS versions prior to 19.2R3-S1 Juniper Networks Junos OS versions prior to 19.3R3-S2 Juniper Networks Junos OS versions prior to 19.4R3-S1 Juniper Networks Junos OS versions prior to 20.1R2 Juniper Networks Junos OS versions prior to 20.1R3 Juniper Networks Junos OS versions prior to 20.2R2 Juniper Networks Junos OS versions prior to 20.2R3 Juniper Networks Junos OS versions prior to 20.3R1-S2 Juniper Networks Junos OS versions prior to 20.3R2

Description: The issue affects Juniper Networks Junos OS platforms configured as DHCPv6 local server or DHCPv6 Relay Agent. If a specific DHCPv6 packet is received, the Juniper Networks Dynamic Host Configuration Protocol Daemon (JDHCPD) process might crash with a core dump, resulting in a restart of the daemon. Continued receipt and processing of these specific packets will repeatedly crash the JDHCPD process and sustain the Denial of Service (DoS) condition. This issue only affects DHCPv6, and DHCPv4 is not affected.

Recommendations: For Juniper Networks Junos OS versions prior to 17.3R3-S11, update to 17.3R3-S11 or later. For Juniper Networks Junos OS versions prior to 17.4R3-S4, update to 17.4R3-S4 or later. For Juniper Networks Junos OS versions prior to 18.1R3-S12, update to 18.1R3-S12 or later. For Juniper Networks Junos OS versions prior to 18.2R3-S7, update to 18.2R3-S7 or later. For Juniper Networks Junos OS versions prior to 18.3R3-S4, update to 18.3R3-S4 or later. For Juniper Networks Junos OS versions prior to 18.4R3-S7, update to 18.4R3-S7 or later. For Juniper Networks Junos OS versions prior to 19.1R3-S4, update to 19.1R3-S4 or later. For Juniper Networks Junos OS versions prior to 19.2R3-S1, update to 19.2R3-S1 or later. For Juniper Networks Junos OS versions prior to 19.3R3-S2, update to 19.3R3-S2 or later. For Juniper Networks Junos OS versions prior to 19.4R3-S1, update to 19.4R3-S1 or later. For Juniper Networks Junos OS versions prior to 20.1R2, update to 20.1R2 or later. For Juniper Networks Junos OS versions prior to 20.1R3, update to 20.1R3 or later. For Juniper Networks Junos OS versions prior to 20.2R2, update to 20.2R2 or later. For Juniper Networks Junos OS versions prior to 20.2R3, update to 20.2R3 or later. For Juniper Networks Junos OS versions prior to 20.3R1-S2, update to 20.3R1-S2 or later. For Juniper Networks Junos OS versions prior to 20.3R2, update to 20.3R2 or later.

Fix

DoS

Improper Handling of Exceptional Conditions

Weakness Enumeration

CWE-703

CWE-755

Related Identifiers

CVE-2021-0241

Affected Products

Junos

References · 3

• https://kb.juniper.net/JSA11168 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-0241 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-0241 · Security Note