Junos OS and Junos OS Evolved: A vulnerability allows a network based unauthenticated attacker which sends a high rate of specific traffic to cause a partial Denial of Service

Summary

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.

Timeline

1. Jul 15, 2021, 8:01 PM UTCCVE published
2. Sep 16, 2024, 11:50 PM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  From 15.1 · fixed in 15.1R7-S9; From 17.3 · fixed in 17.3R3-S12; From 18.3 · fixed in 18.3R3-S5; From 19.1 · fixed in 19.1R3-S5; From 19.2 · fixed in 19.2R3-S2; From 20.1 · fixed in 20.1R2; From 20.2 · fixed in 20.2R2; From 20.3 · fixed in 20.3R2

• Juniper Networks Junos OS Evolved

  fixed in 20.3R2-EVO

References 1