Junos OS vulnerable to cross-site scripting


Junos OS contains a cross-site scripting vulnerability (CWE-79).

Toshitsugu Yoneyama of Mitsui Bussan Secure Directions, Inc. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 6.1 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Changed
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 2.6 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: High
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

Juniper Networks, Inc.
  • Junos OS 12.3 versions prior to 12.3R12-S15 on EX and QFX Series
  • Junos OS 12.3X48 versions prior to 12.3X48-D86, 12.3X48-D90 on SRX Series
  • Junos OS 14.1X53 versions prior to 14.1X53-D51 on EX and QFX Series
  • Junos OS 15.1F6 versions prior to 15.1F6-S13
  • Junos OS 15.1 versions prior to 15.1R7-S5
  • Junos OS 15.1X49 versions prior to 15.1X49-D181, 15.1X49-D190 on SRX Series
  • Junos OS 15.1X53 versions prior to 15.1X53-D238 on QFX5200/QFX5110 Series
  • Junos OS 15.1X53 versions prior to 15.1X53-D592 on EX2300/EX3400 Series
  • Junos OS 16.1 versions prior to 16.1R4-S13, 16.1R7-S5
  • Junos OS 16.2 versions prior to 16.2R2-S10
  • Junos OS 17.1 versions prior to 17.1R2-S11, 17.1R3-S1
  • Junos OS 17.2 versions prior to 17.2R1-S9, 17.2R3-S2
  • Junos OS 17.3 versions prior to 17.3R2-S5, 17.3R3-S5
  • Junos OS 17.4 versions prior to 17.4R2-S6, 17.4R3
  • Junos OS 18.1 versions prior to 18.1R3-S7
  • Junos OS 18.2 versions prior to 18.2R2-S5, 18.2R3
  • Junos OS 18.3 versions prior to 18.3R1-S6, 18.3R2-S1, 18.3R3
  • Junos OS 18.4 versions prior to 18.4R1-S5, 18.4R2
  • Junos OS 19.1 versions prior to 19.1R1-S2, 19.1R2


An arbitrary script may be executed on the user's J-Web screen.

[Update the Software]
Update the software to the latest version according to the information provided by the developer.

[Apply a Workaround]
Applying workarounds listed below may mitigate the impacts of the vulnerability.
* Access the J-Web service from trusted hosts which may not be compromised by cross-site scripting attacks (e.g. deploying jump hosts with no internet access)
* Disable J-Web
Vendor Information

Juniper Networks, Inc.
CWE (What is CWE?)

  1. Cross-site Scripting(CWE-79) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2020-1607

  1. JVN : JVN#21753370
  2. National Vulnerability Database (NVD) : CVE-2020-1607
Revision History

  • [2020/01/10]
      Web page was published