Support Support Downloads Knowledge Base Case Manager My Juniper Community

Knowledge Base

Search our Knowledge Base sites to find answers to your questions.

Ask All Knowledge Base Sites All Knowledge Base Sites JunosE Defect (KA)Knowledge BaseSecurity AdvisoriesTechnical BulletinsTechnotes Sign in to display secure content and recently viewed articles

2020-10 Security Bulletin: Junos OS Evolved: 'console log-out-on-disconnect' fails to terminate session on console cable disconnection (CVE-2020-1666)

0

0

Article ID: JSA11063 SECURITY_ADVISORIES Last Updated: 29 Oct 2020Version: 3.0
Product Affected:
This issue affects all versions of Junos OS Evolved after 18.4R1-EVO.
Problem:

The system console configuration option 'log-out-on-disconnect' In Juniper Networks Junos OS Evolved fails to log out an active CLI session when the console cable is disconnected. This could allow a malicious attacker with physical access to the console the ability to resume a previous interactive session and possibly gain administrative privileges.

This issue affects all Juniper Networks Junos OS Evolved versions after 18.4R1-EVO, prior to 20.2R1-EVO.

Console log out on disconnect is enabled via the following configuration stanza:

[system ports console log-out-on-disconnect]

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was found during internal product security testing or research.

This issue has been assigned CVE-2020-1666.
 

Solution:

The following software releases have been updated to resolve this specific issue: Junos OS Evolved 20.2R1-EVO and all subsequent releases.

This issue is being tracked as 1406238.
 

Workaround:
Limit access to the physical console to only trusted system administrators.
 
Implementation:
Software releases or updates are available for download at https://www.juniper.net/support/downloads/.
 
Modification History:
2020-10-14: Initial Publication

CVSS Score:
6.6 (CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Severity Level:
Medium
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

Related Links

Comment on this article > Affected Products Browse the Knowledge Base for more articles related to these product categories. Select a category to begin.

Getting Up and Running with Junos

Getting Up and Running with Junos Security Alerts and Vulnerabilities Product Alerts and Software Release Notices Problem Report (PR) Search Tool EOL Notices and Bulletins JTAC User Guide Customer Care User Guide Pathfinder SRX High Availability Configurator SRX VPN Configurator Training Courses and Videos End User Licence Agreement Global Search