An Improper Certificate Validation weakness in the SRX Series Application Identification (app-id) signature update client of Juniper Networks Junos OS allows an attacker to perform Man-in-the-Middle (MitM) attacks which may compromise the integrity and confidentiality of the device.

This issue affects:

Juniper Networks Junos OS 15.1X49 versions prior to 15.1X49-D120 on SRX Series devices.

No other versions of Junos OS are affected.

The following minimum configuration is required:

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-2019-0054 .

The following software releases have been updated to resolve this specific issue: 15.1X49-D120, and all subsequent releases.

This issue is being tracked as PR 1291665 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/ .

Set the following command in the device for affected releases:

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team
• CVE-2019-0054 at cve.mitre.org
• https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-application-identification-overview.html