Vulnerabilities > CVE-2020-1632 - Improper Handling of Exceptional Conditions vulnerability in Juniper Junos

047910
CVSS 7.8 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
COMPLETE
network
low complexity
juniper
CWE-755
nessus

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.

Nessus

NASL familyJunos Local Security Checks
NASL idJUNIPER_JSA11013.NASL
descriptionThe 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 seen2020-06-10
modified2020-05-25
plugin id136828
published2020-05-25
reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/136828
titleJunos OS Invalid BGP Update Termination Denial Of Service Vulnerability (JSA11013)