This issue affects Junos OS 12.1X46, 12.3, 12.3X48, 14.1X53, 15.1, 15.1X49, 15.1X53, 16.1, 16.2, 17.1, 17.2, 17.3, 17.4, 18.1, 18.2, 18.3, 18.4.
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.
Successful exploitation require J-Web to be enabled on the device.
The examples of the config stanza affected by this issue:
system services web-management http
system services web-management https
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was discovered during an external security research.
This issue has been assigned CVE-2019-0047.
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.
This issue is being tracked as PR 1410400 which is visible on the Customer Support website.
Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).
Disable J-Web.
Limit access to the Junos device to only trusted hosts and networks.
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."
The Juniper SIRT would like to would like to acknowledge and thank Farid Heydari for finding and reporting this issue.