Vulnerability Database

346,508

Total vulnerabilities in the database

CVE-2018-0020 — juniper / junos

Improper Input Validation

Junos OS may be impacted by the receipt of a malformed BGP UPDATE which can lead to a routing process daemon (rpd) crash and restart. Receipt of a repeated malformed BGP UPDATEs can result in an extended denial of service condition for the device. This malformed BGP UPDATE does not propagate to other BGP peers. Affected releases are Juniper Networks Junos OS: 14.1X53 versions prior to 14.1X53-D47; 15.1 versions prior to 15.1F6-S10, 15.1R4-S9, 15.1R6-S6, 15.1R7; 15.1X49 versions prior to 15.1X49-D130 on SRX; 15.1X53 versions prior to 15.1X53-D66 on QFX10K; 15.1X53 versions prior to 15.1X53-D58 on EX2300/EX3400; 15.1X53 versions prior to 15.1X53-D233 on QFX5200/QFX5110; 15.1X53 versions prior to 15.1X53-D471 on NFX; 16.1 versions prior to 16.1R3-S8, 16.1R4-S9, 16.1R5-S3, 16.1R6-S3, 16.1R7; 16.1X65 versions prior to 16.1X65-D47; 16.2 versions prior to 16.2R1-S6, 16.2R2-S5, 16.2R3; 17.1 versions prior to 17.1R2-S3, 17.1R3; 17.2 versions prior to 17.2R1-S3, 17.2R2-S1, 17.2R3; 17.2X75 versions prior to 17.2X75-D70; 13.2 versions above and including 13.2R1. Versions prior to 13.2R1 are not affected. Juniper SIRT is not aware of any malicious exploitation of this vulnerability. No other Juniper Networks products or platforms are affected by this issue.

  • Published: Apr 11, 2018
  • Updated: Nov 9, 2025
  • CVE: CVE-2018-0020
  • Severity: High
  • Exploit:

CVSS v2:

  • Severity: High
  • Score: 7.8
  • AV:N/AC:L/Au:N/C:N/I:N/A:C

CWEs:

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 15.1x49.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-d120 15.1x49-d120.x
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-d40 14.1x53-d40.x
juniper / junos 14.1x53-d30 14.1x53-d30.x
juniper / junos 14.1x53-d42 14.1x53-d42.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-d43 14.1x53-d43.x
juniper / junos 14.1x53 14.1x53.x
juniper / junos 14.1x53-d44 14.1x53-d44.x
juniper / junos 14.1x53-d26 14.1x53-d26.x
juniper / junos 14.1x53-d46 14.1x53-d46.x
juniper / junos 15.1x53-d10 15.1x53-d10.x
juniper / junos 15.1x53-d20 15.1x53-d20.x
juniper / junos 15.1x53-d30 15.1x53-d30.x
juniper / junos 15.1x53 15.1x53.x
juniper / junos 15.1x53-d33 15.1x53-d33.x
juniper / junos 15.1x53-d32 15.1x53-d32.x
juniper / junos 15.1x53-d57 15.1x53-d57.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
juniper / junos 15.1x53-d51 15.1x53-d51.x
juniper / junos 15.1x53-d52 15.1x53-d52.x
juniper / junos 15.1x53-d55 15.1x53-d55.x
juniper / junos 16.1-r1 16.1-r1.x
juniper / junos 16.1-r4 16.1-r4.x
juniper / junos 16.1-r3 16.1-r3.x
juniper / junos 16.1-r5 16.1-r5.x
juniper / junos 16.1-r2 16.1-r2.x
juniper / junos 16.1-r6 16.1-r6.x
juniper / junos 16.2-r3 16.2-r3.x
juniper / junos 16.2-r2 16.2-r2.x
juniper / junos 16.2-r1 16.2-r1.x
juniper / junos 17.1-r3 17.1-r3.x
juniper / junos 17.1-r1 17.1-r1.x
juniper / junos 17.1-r2 17.1-r2.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-r1 15.1-r1.x
juniper / junos 15.1 15.1.x
juniper / junos 15.1-f1 15.1-f1.x
juniper / junos 15.1-f4 15.1-f4.x
juniper / junos 15.1-f6 15.1-f6.x
juniper / junos 15.1-f2 15.1-f2.x
juniper / junos 15.1-f3 15.1-f3.x
juniper / junos 15.1x53-d62 15.1x53-d62.x
juniper / junos 15.1x53-d63 15.1x53-d63.x
juniper / junos 15.1x53-d64 15.1x53-d64.x
juniper / junos 15.1x53-d210 15.1x53-d210.x
juniper / junos 15.1x53-d60 15.1x53-d60.x
juniper / junos 15.1x53-d61 15.1x53-d61.x
juniper / junos 15.1x53-d230 15.1x53-d230.x
juniper / junos 15.1x53-d65 15.1x53-d65.x
juniper / junos 15.1x53-d231 15.1x53-d231.x
juniper / junos 15.1x53-d58 15.1x53-d58.x
juniper / junos 15.1x53-d66 15.1x53-d66.x
juniper / junos 15.1x53-d232 15.1x53-d232.x
juniper / junos 15.1x53-d470 15.1x53-d470.x
juniper / junos 15.1x53-d233 15.1x53-d233.x
juniper / junos 17.2-r1 17.2-r1.x
juniper / junos 17.2-r2 17.2-r2.x
juniper / junos 17.2-r3 17.2-r3.x
juniper / junos 16.1x65-d30 16.1x65-d30.x
juniper / junos 16.1x65-d35 16.1x65-d35.x
juniper / junos 16.1x65-d40 16.1x65-d40.x
juniper / junos 17.2x75 17.2x75.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.