title: Junos OS: Unauthenticated access vulnerability in J-Web
description: An Improper Authentication vulnerability in upload-file.php, used by the J-Web component of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to upload arbitrary files to temporary folders on the device. This issue affects Juniper Networks Junos OS: All versions prior to 19.4R3-S11; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S7; 20.3 version 20.3R1 and later versions; 20.4 versions prior to 20.4R3-S6; 21.1 version 21.1R1 and later versions; 21.2 versions prior to 21.2R3-S4; 21.3 versions prior to 21.3R3-S3; 21.4 versions prior to 21.4R3-S3; 22.1 versions prior to 22.1R3-S1; 22.2 versions prior to 22.2R2-S1, 22.2R3; 22.3 versions prior to 22.3R1-S2, 22.3R2.
problem types: CWE-287 Improper Authentication
affected:
{
vendor: Juniper Networks
product: Junos OS
versions:
version: unspecified, lessThan: 19.4R3-S11, status: affected, versionType: custom
version: 20.1R1, status: affected, lessThan: 20.1*, versionType: custom
version: 20.2, status: affected, lessThan: 20.2R3-S7, versionType: custom
version: 20.3R1, status: affected, lessThan: 20.3*, versionType: custom
version: 20.4, status: affected, lessThan: 20.4R3-S6, versionType: custom
version: 21.1R1, status: affected, lessThan: 21.1*, versionType: custom
version: 21.2, status: affected, lessThan: 21.2R3-S4, versionType: custom
version: 21.3, status: affected, lessThan: 21.3R3-S3, versionType: custom
version: 21.4, status: affected, lessThan: 21.4R3-S3, versionType: custom
version: 22.1, status: affected, lessThan: 22.1R3-S1, versionType: custom
version: 22.2, status: affected, lessThan: 22.2R2-S1, 22.2R3, versionType: custom
version: 22.3, status: affected, lessThan: 22.3R1-S2, 22.3R2, versionType: custom
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: LOW
availabilityImpact: NONE
baseScore: 5.3
baseSeverity: MEDIUM
]
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 19.4R3-S11, 20.2R3-S7, 20.4R3-S6, 21.2R3-S4, 21.3R3-S3, 21.4R3-S3, 22.1R3-S1, 22.2R2-S1, 22.2R3, 22.3R1-S2, 22.3R2, 22.4R1, 22.4R2, 23.1R1, and all subsequent releases.
workarounds: Disable J-Web, or limit access to only trusted hosts.