title: Junos OS: SRX1500, vSRX, SRX4K, NFX150, NFX250: Denial of service vulnerability executing local CLI command
description: An input validation vulnerability exists in Juniper Networks Junos OS, allowing an attacker to crash the srxpfe process, causing a Denial of Service (DoS) through the use of specific maintenance commands. The srxpfe process restarts automatically, but continuous execution of the commands could lead to an extended Denial of Service condition. This issue only affects the SRX1500, SRX4100, SRX4200, NFX150, NFX250, and vSRX-based platforms. No other products or platforms are affected by this vulnerability. This issue affects Juniper Networks Junos OS: 15.1X49 versions prior to 15.1X49-D220 on SRX1500, SRX4100, SRX4200, vSRX; 17.4 versions prior to 17.4R3-S3 on SRX1500, SRX4100, SRX4200, vSRX; 18.1 versions prior to 18.1R3-S11 on SRX1500, SRX4100, SRX4200, vSRX, NFX150; 18.2 versions prior to 18.2R3-S5 on SRX1500, SRX4100, SRX4200, vSRX, NFX150, NFX250; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3 on SRX1500, SRX4100, SRX4200, vSRX, NFX150, NFX250; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4 on SRX1500, SRX4100, SRX4200, vSRX, NFX150, NFX250; 19.1 versions prior to 19.1R3-S2 on SRX1500, SRX4100, SRX4200, vSRX, NFX150, NFX250; 19.2 versions prior to 19.2R1-S5, 19.2R3 on SRX1500, SRX4100, SRX4200, vSRX, NFX150, NFX250. This issue does not affect Junos OS 19.3 or any subsequent version.
problem types: CWE-20 Improper Input Validation
affected:
{
platforms: SRX1500, SRX4100, SRX4200, vSRX
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 15.1X49-D220, status: affected, version: 15.1X49, versionType: custom
lessThan: 17.4R3-S3, status: affected, version: 17.4, versionType: custom
}
{
platforms: SRX1500, SRX4100, SRX4200, vSRX, NFX150
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 18.1R3-S11, status: affected, version: 18.1, versionType: custom
}
{
platforms: SRX1500, SRX4100, SRX4200, vSRX, NFX150, NFX250
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 18.2R3-S5, status: affected, version: 18.2, versionType: custom
lessThan: 18.3R2-S4, 18.3R3-S3, status: affected, version: 18.3, versionType: custom
lessThan: 18.4R2-S5, 18.4R3-S4, status: affected, version: 18.4, versionType: custom
lessThan: 19.1R3-S2, status: affected, version: 19.1, versionType: custom
lessThan: 19.2R1-S5, 19.2R3, status: affected, version: 19.2, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: HIGH
baseScore: 5.5
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
version: 3.1
]
exploits: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
solutions: The following software releases have been updated to resolve this specific issue: Junos OS 15.1X49-D220, 17.4R3-S3, 18.1R3-S11, 18.2R3-S5, 18.3R2-S4, 18.3R3-S3, 18.4R2-S5, 18.4R3-S4, 19.1R3-S2, 19.2R1-S5, and 19.2R3.
Note: This fix has also been proactively committed into other releases that might not be vulnerable to this issue.
workarounds: Use access lists or firewall filters to limit access to the device only from trusted hosts and trusted administrators.