CVE-2020-1654: Juniper Junos

Critical severity, CVSS 9.8. EPSS: 2.2% chance of exploitation in the next 30 days.

On Juniper Networks SRX Series with ICAP (Internet Content Adaptation Protocol) redirect service enabled, processing a malformed HTTP message can lead to a Denial of Service (DoS) or Remote Code Execution (RCE) Continued processing of this malformed HTTP message may result in an extended Denial of Service (DoS) condition. The offending HTTP message that causes this issue may originate both from the HTTP server or the HTTP client. This issue affects Juniper Networks Junos OS on SRX Series: 18.1 versions prior to 18.1R3-S9 ; 18.2 versions prior to 18.2R2-S7, 18.2R3-S3; 18.3 versions prior to 18.3R1-S7, 18.3R2-S4, 18.3R3-S1; 18.4 versions prior to 18.4R1-S7, 18.4R2-S4, 18.4R3; 19.1 versions prior to 19.1R1-S5, 19.1R2; 19.2 versions prior to 19.2R1-S2, 19.2R2; 19.3 versions prior to 19.3R2. This issue does not affect Juniper Networks Junos OS prior to 18.1R1.

Affected products

• Juniper Junos: version 18.1 only; version 18.2 only; version 18.3 only; version 18.4 only; version 19.1 only; version 19.2 only; …

Published 2020-07-17. Last modified 2026-06-17.