Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2020-1656


The DHCPv6 Relay-Agent service, part of the Juniper Enhanced jdhcpd daemon shipped with Juniper Networks Junos OS has an Improper Input Validation vulnerability which will result in a Denial of Service (DoS) condition when a DHCPv6 client sends a specific DHPCv6 message allowing an attacker to potentially perform a Remote Code Execution (RCE) attack on the target device. Continuous receipt of the specific DHCPv6 client message will result in an extended Denial of Service (DoS) condition. If adjacent devices are also configured to relay DHCP packets, and are not affected by this issue and simply transparently forward unprocessed client DHCPv6 messages, then the attack vector can be a Network-based attack, instead of an Adjacent-device attack. No other DHCP services are affected. Receipt of the packet without configuration of the DHCPv6 Relay-Agent service, will not result in exploitability of this issue. This issue affects Juniper Networks Junos OS: 12.3 versions prior to 12.3R12-S15; 12.3X48 versions prior to 12.3X48-D95; 14.1X53 versions prior to 14.1X53-D53; 15.1 versions prior to 15.1R7-S6; 15.1X49 versions prior to 15.1X49-D200; 15.1X53 versions prior to 15.1X53-D593; 16.1 versions prior to 16.1R7-S7; 16.2 versions prior to 16.2R2-S11; 17.1 versions prior to 17.1R2-S11, 17.1R3-S2; 17.2 versions prior to 17.2R3-S3; 17.2X75 versions prior to 17.2X75-D44; 17.3 versions prior to 17.3R3-S7; 17.4 versions prior to 17.4R2-S9, 17.4R3; 18.1 versions prior to 18.1R3-S9; 18.2 versions prior to 18.2R2-S6, 18.2R3-S2; 18.2X75 versions prior to 18.2X75-D12, 18.2X75-D33, 18.2X75-D435, 18.2X75-D60; 18.3 versions prior to 18.3R1-S7, 18.3R2-S3, 18.3R3-S1; 18.4 versions prior to 18.4R1-S5, 18.4R2-S3, 18.4R3; 19.1 versions prior to 19.1R1-S4, 19.1R2; 19.2 versions prior to 19.2R1-S3, 19.2R2; 19.3 versions prior to 19.3R2.


Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.8, indicating it requires adjacent network access with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 1 product from juniper organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2020-10-16T21:15:12.083

Last Modified

2024-11-21T05:11:06.020

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

AV:A/AC:L/Au:N/C:P/I:P/A:P

  • Access Vector: ADJACENT_NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: PARTIAL
  • Availability Impact: PARTIAL
Exploitability Score

6.5

Impact Score

6.4

Weaknesses
  • Type: Secondary
    CWE-20
    CWE-476
  • Type: Primary
    CWE-20

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System juniper junos 12.3 Yes
Operating System juniper junos 12.3 Yes
Operating System juniper junos 12.3 Yes
Operating System juniper junos 12.3 Yes
Operating System juniper junos 12.3 Yes
Operating System juniper junos 12.3 Yes
Operating System juniper junos 12.3 Yes
Operating System juniper junos 12.3 Yes
Operating System juniper junos 12.3 Yes
Operating System juniper junos 12.3 Yes
Operating System juniper junos 12.3 Yes
Operating System juniper junos 12.3 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 12.3x48 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 14.1x53 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x49 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 15.1x53 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.1 Yes
Operating System juniper junos 16.2 Yes
Operating System juniper junos 16.2 Yes
Operating System juniper junos 16.2 Yes
Operating System juniper junos 16.2 Yes
Operating System juniper junos 16.2 Yes
Operating System juniper junos 16.2 Yes
Operating System juniper junos 16.2 Yes
Operating System juniper junos 16.2 Yes
Operating System juniper junos 16.2 Yes
Operating System juniper junos 16.2 Yes
Operating System juniper junos 16.2 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.1 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2 Yes
Operating System juniper junos 17.2x75 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.3 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 17.4 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.1 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2 Yes
Operating System juniper junos 18.2x75 Yes
Operating System juniper junos 18.2x75 Yes
Operating System juniper junos 18.2x75 Yes
Operating System juniper junos 18.2x75 Yes
Operating System juniper junos 18.2x75 Yes
Operating System juniper junos 18.2x75 Yes
Operating System juniper junos 18.3 Yes
Operating System juniper junos 18.3 Yes
Operating System juniper junos 18.3 Yes
Operating System juniper junos 18.3 Yes
Operating System juniper junos 18.3 Yes
Operating System juniper junos 18.3 Yes
Operating System juniper junos 18.3 Yes
Operating System juniper junos 18.3 Yes
Operating System juniper junos 18.3 Yes
Operating System juniper junos 18.3 Yes
Operating System juniper junos 18.3 Yes
Operating System juniper junos 18.4 Yes
Operating System juniper junos 18.4 Yes
Operating System juniper junos 18.4 Yes
Operating System juniper junos 18.4 Yes
Operating System juniper junos 18.4 Yes
Operating System juniper junos 18.4 Yes
Operating System juniper junos 18.4 Yes
Operating System juniper junos 19.1 Yes
Operating System juniper junos 19.1 Yes
Operating System juniper junos 19.1 Yes
Operating System juniper junos 19.1 Yes
Operating System juniper junos 19.1 Yes
Operating System juniper junos 19.2 Yes
Operating System juniper junos 19.2 Yes
Operating System juniper junos 19.2 Yes
Operating System juniper junos 19.2 Yes
Operating System juniper junos 19.3 Yes
Operating System juniper junos 19.3 Yes
Operating System juniper junos 19.3 Yes

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For juniper's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.