Vulnerability Monitor

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CVE-2021-0291


An Exposure of System Data vulnerability in Juniper Networks Junos OS and Junos OS Evolved, where a sensitive system-level resource is not being sufficiently protected, allows a network-based unauthenticated attacker to send specific traffic which partially reaches this resource. A high rate of specific traffic may lead to a partial Denial of Service (DoS) as the CPU utilization of the RE is significantly increased. The SNMP Agent Extensibility (agentx) process should only be listening to TCP port 705 on the internal routing instance. External connections destined to port 705 should not be allowed. This issue affects: Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S9; 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13, 17.4R3-S5; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2; 20.3 versions prior to 20.3R2. Juniper Networks Junos OS Evolved versions prior to 20.3R2-EVO. This issue does not affect Juniper Networks Junos OS versions prior to 13.2R1.


Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, and limited availability for affected systems. Impacting 2 products from juniper, from juniper organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, 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

2021-07-15T20:15:10.943

Last Modified

2024-11-21T05:42:25.110

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

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

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

10.0

Impact Score

4.9

Weaknesses
  • Type: Secondary
    CWE-497
  • Type: Primary
    CWE-200

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
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 15.1 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 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 17.3 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 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 18.3 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 18.3 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 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 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 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 19.1 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 19.1 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 19.1 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 19.2 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 19.2 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
Operating System juniper junos 19.3 Yes
Operating System juniper junos 19.3 Yes
Operating System juniper junos 19.3 Yes
Operating System juniper junos 19.3 Yes
Operating System juniper junos 19.3 Yes
Operating System juniper junos 19.3 Yes
Operating System juniper junos 19.3 Yes
Operating System juniper junos 19.3 Yes
Operating System juniper junos 19.4 Yes
Operating System juniper junos 19.4 Yes
Operating System juniper junos 19.4 Yes
Operating System juniper junos 19.4 Yes
Operating System juniper junos 19.4 Yes
Operating System juniper junos 19.4 Yes
Operating System juniper junos 19.4 Yes
Operating System juniper junos 19.4 Yes
Operating System juniper junos 20.1 Yes
Operating System juniper junos 20.1 Yes
Operating System juniper junos 20.1 Yes
Operating System juniper junos 20.1 Yes
Operating System juniper junos 20.1 Yes
Operating System juniper junos 20.2 Yes
Operating System juniper junos 20.2 Yes
Operating System juniper junos 20.2 Yes
Operating System juniper junos 20.2 Yes
Operating System juniper junos 20.3 Yes
Operating System juniper junos 20.3 Yes
Operating System juniper junos_os_evolved 19.2 Yes
Operating System juniper junos_os_evolved 19.2 Yes
Operating System juniper junos_os_evolved 19.3 Yes
Operating System juniper junos_os_evolved 19.3 Yes
Operating System juniper junos_os_evolved 19.4 Yes
Operating System juniper junos_os_evolved 19.4 Yes
Operating System juniper junos_os_evolved 19.4 Yes
Operating System juniper junos_os_evolved 20.1 Yes
Operating System juniper junos_os_evolved 20.1 Yes
Operating System juniper junos_os_evolved 20.1 Yes
Operating System juniper junos_os_evolved 20.2 Yes
Operating System juniper junos_os_evolved 20.3 Yes
Operating System juniper junos_os_evolved 20.3 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.