Vulnerability Database

346,508

Total vulnerabilities in the database

CVE-2019-0054 — juniper / junos

Improper Certificate Validation

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.

  • Published: Oct 9, 2019
  • Updated: Nov 9, 2025
  • CVE: CVE-2019-0054
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 6.8
  • AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS v2:

  • Severity: Medium
  • Score: 5.8
  • AV:N/AC:M/Au:N/C:P/I:P/A:N
Software From Fixed in
juniper / junos 15.1x49-d50 15.1x49-d50.x
juniper / junos 15.1x49-d30 15.1x49-d30.x
juniper / junos 15.1x49-d70 15.1x49-d70.x
juniper / junos 15.1x49-d80 15.1x49-d80.x
juniper / junos 15.1x49-d110 15.1x49-d110.x
juniper / junos 15.1x49-d60 15.1x49-d60.x
juniper / junos 15.1x49-d100 15.1x49-d100.x
juniper / junos 15.1x49-d35 15.1x49-d35.x
juniper / junos 15.1x49-d45 15.1x49-d45.x
juniper / junos 15.1x49-d75 15.1x49-d75.x
juniper / junos 15.1x49-d65 15.1x49-d65.x
juniper / junos 15.1x49-d90 15.1x49-d90.x
juniper / junos 15.1x49-d40 15.1x49-d40.x
juniper / junos 15.1x49-d20 15.1x49-d20.x
juniper / junos 15.1x49-d10 15.1x49-d10.x
juniper / junos 15.1x49-d55 15.1x49-d55.x
juniper / junos 15.1x49 15.1x49.x

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.