Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Published: 2020-04-15
Updated: 2021-10-25
Summary
In a certain condition, receipt of a specific BGP UPDATE message might cause Juniper Networks Junos OS and Junos OS Evolved devices to advertise an invalid BGP UPDATE message to other peers, causing the other peers to terminate the established BGP session, creating a Denial of Service (DoS) condition. For example, Router A sends a specific BGP UPDATE to Router B, causing Router B to send an invalid BGP UPDATE message to Router C, resulting in termination of the BGP session between Router B and Router C. This issue might occur when there is at least a single BGP session established on the device that does not support 4 Byte AS extension (RFC 4893). Repeated receipt of the same BGP UPDATE can result in an extended DoS condition. This issue affects Juniper Networks Junos OS: 16.1 versions prior to 16.1R7-S6; 16.2 versions prior to 16.2R2-S11; 17.1 versions prior to 17.1R2-S11, 17.1R3-S2; 17.2 versions prior to 17.2R1-S9, 17.2R2-S8, 17.2R3-S3; 17.2X75 versions prior to 17.2X75-D105, 17.2X75-D110, 17.2X75-D44; 17.3 versions prior to 17.3R2-S5, 17.3R3-S7; 17.4 versions prior to 17.4R2-S8, 17.4R3; 18.1 versions prior to 18.1R3-S8; 18.2 versions prior to 18.2R2-S6, 18.2R3-S2; 18.2X75 versions prior to 18.2X75-D12, 18.2X75-D33, 18.2X75-D411, 18.2X75-D420, 18.2X75-D51, 18.2X75-D60; 18.3 versions prior to 18.3R1-S6, 18.3R2-S3, 18.3R3; 18.4 versions prior to 18.4R1-S5, 18.4R3; 18.4 version 18.4R2 and later versions; 19.1 versions prior to 19.1R1-S3, 19.1R2; 19.2 versions prior to 19.2R1-S2, 19.2R2. This issue does not affect Juniper Networks Junos OS prior to 16.1R1. This issue affects Juniper Networks Junos OS Evolved prior to 19.2R2-EVO.
Vulnerable Configurations
| Part | Description | Count |
| OS | Juniper | 121 |
Common Weakness Enumeration (CWE)
Nessus
| NASL family | Junos Local Security Checks |
| NASL id | JUNIPER_JSA11013.NASL |
| description | The version of Junos OS installed on the remote host is prior to 16.1R7-S6, 16.2R2-S11, 17.1R2-S11, 17.2R1-S9, 17.2X75-D105, 17.3R2-S5, 17.4R2-S8, 18.1R3-S8, 18.2R2-S6, 18.2X75-D12, 18.3R1-S6, 18.4R1-S5, 19.1R1-S3, or 19.2R1-S2. It is, therefore, affected by a denial of service (DoS) vulnerability. An unauthenticated, remote attacker can exploit this, by sending a specific BGP UPDATE message, in order to cause other peers to terminate the established BGP session as referenced in the JSA11013 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application |
| last seen | 2020-06-10 |
| modified | 2020-05-25 |
| plugin id | 136828 |
| published | 2020-05-25 |
| reporter | This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/136828 |
| title | Junos OS Invalid BGP Update Termination Denial Of Service Vulnerability (JSA11013) |