Vulnerability Database

346,508

Total vulnerabilities in the database

CVE-2019-0006 — juniper / junos

Use of Uninitialized Resource

A certain crafted HTTP packet can trigger an uninitialized function pointer deference vulnerability in the Packet Forwarding Engine manager (fxpc) on all EX, QFX and MX Series devices in a Virtual Chassis configuration. This issue can result in a crash of the fxpc daemon or may potentially lead to remote code execution. This issue only occurs when the crafted packet it destined to the device. Affected releases are Juniper Networks Junos OS: 14.1X53 versions prior to 14.1X53-D47 on EX and QFX Virtual Chassis Platforms; 15.1 versions prior to 15.1R7-S3 all Virtual Chassis Platforms 15.1X53 versions prior to 15.1X53-D50 on EX and QFX Virtual Chassis Platforms.

  • Published: Jan 15, 2019
  • Updated: Nov 9, 2025
  • CVE: CVE-2019-0006
  • Severity: Critical
  • Exploit:

CVSS v3:

  • Severity: Critical
  • Score: 9.8
  • AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/Au:N/C:P/I:P/A:P

CWEs:

Software From Fixed in
juniper / junos 14.1x53-d45 14.1x53-d45.x
juniper / junos 14.1x53-d15 14.1x53-d15.x
juniper / junos 14.1x53-d35 14.1x53-d35.x
juniper / junos 14.1x53-d10 14.1x53-d10.x
juniper / junos 14.1x53-d40 14.1x53-d40.x
juniper / junos 14.1x53-d30 14.1x53-d30.x
juniper / junos 14.1x53-r1 14.1x53-r1.x
juniper / junos 14.1x53-d25 14.1x53-d25.x
juniper / junos 14.1x53-d27 14.1x53-d27.x
juniper / junos 14.1x53-d16 14.1x53-d16.x
juniper / junos 14.1x53 14.1x53.x
juniper / junos 14.1x53-d26 14.1x53-d26.x
juniper / junos 14.1x53-d46 14.1x53-d46.x
juniper / junos 15.1-r3 15.1-r3.x
juniper / junos 15.1-r6 15.1-r6.x
juniper / junos 15.1-r4 15.1-r4.x
juniper / junos 15.1-r2 15.1-r2.x
juniper / junos 15.1-r5 15.1-r5.x
juniper / junos 15.1-r1 15.1-r1.x
juniper / junos 15.1x53-d20 15.1x53-d20.x
juniper / junos 15.1x53-d30 15.1x53-d30.x
juniper / junos 15.1x53-d33 15.1x53-d33.x
juniper / junos 15.1x53-d32 15.1x53-d32.x
juniper / junos 15.1x53-d34 15.1x53-d34.x
juniper / junos 15.1x53-d21 15.1x53-d21.x
juniper / junos 15.1x53-d50 15.1x53-d50.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.