title: Junos OS: Persistent XSS vulnerability in J-Web
description: A persistent Cross-Site Scripting (XSS) vulnerability in Junos OS J-Web interface may allow remote unauthenticated attackers to perform administrative actions on the Junos device. Successful exploitation requires a Junos administrator to first perform certain diagnostic actions on J-Web. This issue affects: Juniper Networks Junos OS 12.1X46 versions prior to 12.1X46-D86; 12.3 versions prior to 12.3R12-S13; 12.3X48 versions prior to 12.3X48-D80; 14.1X53 versions prior to 14.1X53-D51; 15.1 versions prior to 15.1F6-S13, 15.1R7-S4; 15.1X49 versions prior to 15.1X49-D171, 15.1X49-D180; 15.1X53 versions prior to 15.1X53-D497, 15.1X53-D69; 16.1 versions prior to 16.1R7-S5; 16.2 versions prior to 16.2R2-S9; 17.1 versions prior to 17.1R3; 17.2 versions prior to 17.2R1-S8, 17.2R2-S7, 17.2R3-S1; 17.3 versions prior to 17.3R3-S6; 17.4 versions prior to 17.4R1-S7, 17.4R2-S4, 17.4R3; 18.1 versions prior to 18.1R3-S5; 18.2 versions prior to 18.2R1-S5, 18.2R2-S3, 18.2R3; 18.3 versions prior to 18.3R1-S3, 18.3R2, 18.3R3; 18.4 versions prior to 18.4R1-S2, 18.4R2.
problem types: CWE-79 Cross-site Scripting (XSS)
affected:
{
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 12.1X46-D86, status: affected, version: 12.1X46, versionType: custom
lessThan: 12.3R12-S13, status: affected, version: 12.3, versionType: custom
lessThan: 12.3X48-D80, status: affected, version: 12.3X48, versionType: custom
lessThan: 14.1X53-D51, status: affected, version: 14.1X53, versionType: custom
lessThan: 15.1F6-S13, 15.1R7-S4, status: affected, version: 15.1, versionType: custom
lessThan: 15.1X49-D171, 15.1X49-D180, status: affected, version: 15.1X49, versionType: custom
lessThan: 15.1X53-D497, 15.1X53-D69, status: affected, version: 15.1X53, versionType: custom
lessThan: 16.1R7-S5, status: affected, version: 16.1, versionType: custom
lessThan: 16.2R2-S9, status: affected, version: 16.2, versionType: custom
lessThan: 17.1R3, status: affected, version: 17.1, versionType: custom
lessThan: 17.2R1-S8, 17.2R2-S7, 17.2R3-S1, status: affected, version: 17.2, versionType: custom
lessThan: 17.3R3-S6, status: affected, version: 17.3, versionType: custom
lessThan: 17.4R1-S7, 17.4R2-S4, 17.4R3, status: affected, version: 17.4, versionType: custom
lessThan: 18.1R3-S5, status: affected, version: 18.1, versionType: custom
lessThan: 18.2R1-S5, 18.2R2-S3, 18.2R3, status: affected, version: 18.2, versionType: custom
lessThan: 18.3R1-S3, 18.3R2, 18.3R3, status: affected, version: 18.3, versionType: custom
lessThan: 18.4R1-S2, 18.4R2, status: affected, version: 18.4, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.8
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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: 12.1X46-D86, 12.3R12-S13, 12.3X48-D80, 14.1X53-D51, 15.1F6-S13, 15.1R7-S4, 15.1X49-D171, 15.1X49-D180, 15.1X53-D497, 15.1X53-D69, 16.1R7-S5, 16.2R2-S9, 17.1R3, 17.2R1-S8, 17.2R2-S7, 17.2R3-S1, 17.3R3-S6, 17.4R1-S7, 17.4R2-S4, 17.4R3, 18.1R3-S5, 18.2R1-S5, 18.2R2-S3, 18.2R3, 18.3R1-S3, 18.3R2, 18.4R1-S2, 18.4R2, 19.1R1, and all subsequent releases.
workarounds: Disable J-Web.
Limit access to the Junos device to only trusted hosts and networks.