Junos OS vulnerable to directory traversal


Junos OS contains a directory traversal vulnerability (CWE-22).

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 5.4 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 5.5 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single Instance
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

Juniper Networks, Inc.
  • Junos OS 12.3 versions prior to 12.3R12-S13
  • Junos OS 12.3X48 versions prior to 12.3X48-D85 on SRX Series
  • Junos OS 14.1X53 versions prior to 14.1X53-D51
  • 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-D180 on SRX Series
  • Junos OS 15.1X53 versions prior to 15.1X53-D238 on QFX5200/QFX5110 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 17.1R3-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-S9, 17.4R3
  • Junos OS 18.1 versions prior to 18.1R3-S8
  • Junos OS 18.2 versions prior to 18.2R3
  • Junos OS 18.3 versions prior to 18.3R2-S3, 18.3R3
  • Junos OS 18.4 versions prior to 18.4R2
  • Junos OS 19.1 versions prior to 19.1R1-S4, 19.1R


Files on the server may be viewed or deleted by an authenticated J-web user.

According to the developer, this issue does not affect system files that can be accessed only by root user.

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

[Apply a Workaround]
Applying a workaround listed below may mitigate the impacts of the vulnerability.
* Limit access to the J-Web interface to only trusted users
Vendor Information

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

  1. Path Traversal(CWE-22) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2020-1606

  1. JVN : JVN#07375820
  2. National Vulnerability Database (NVD) : CVE-2020-1606
Revision History

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