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2020-01 Security Bulletin: Junos OS: Cross-Site Scripting (XSS) in J-Web (CVE-2020-1607)

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Article ID: JSA10986 SECURITY_ADVISORIES Last Updated: 16 Jan 2020Version: 5.0
Product Affected:
This issue affects Junos OS 12.3, 12.3X48, 14.1X53, 15.1, 15.1F6, 15.1X49, 15.1X53, 16.1, 16.2, 17.1, 17.2, 17.3, 17.4, 18.1, 18.2, 18.3, 18.4, 19.1.
Problem:

Insufficient Cross-Site Scripting (XSS) protection in J-Web may potentially allow a remote attacker to inject web script or HTML, hijack the target user's J-Web session and perform administrative actions on the Junos device as the targeted user.

This issue affects Juniper Networks Junos OS

12.3 versions prior to 12.3R12-S15;

12.3X48 versions prior to 12.3X48-D86, 12.3X48-D90 on SRX Series;

14.1X53 versions prior to 14.1X53-D51 on EX and QFX Series;

15.1F6 versions prior to 15.1F6-S13;

15.1 versions prior to 15.1R7-S5;

15.1X49 versions prior to 15.1X49-D181, 15.1X49-D190 on SRX Series;

15.1X53 versions prior to 15.1X53-D238 on QFX5200/QFX5110 Series;

15.1X53 versions prior to 15.1X53-D592 on EX2300/EX3400 Series;

16.1 versions prior to 16.1R4-S13, 16.1R7-S5;

16.2 versions prior to 16.2R2-S10;

17.1 versions prior to 17.1R2-S11, 17.1R3-S1;

17.2 versions prior to 17.2R1-S9, 17.2R3-S2;

17.3 versions prior to 17.3R2-S5, 17.3R3-S5;

17.4 versions prior to 17.4R2-S6, 17.4R3;

18.1 versions prior to 18.1R3-S7;

18.2 versions prior to 18.2R2-S5, 18.2R3;

18.3 versions prior to 18.3R1-S6, 18.3R2-S1, 18.3R3;

18.4 versions prior to 18.4R1-S5, 18.4R2;

19.1 versions prior to 19.1R1-S2, 19.1R2.

This issue requires 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

This issue was discovered during an external security research.

This issue has been assigned CVE-2020-1607.

Solution:

The following software releases have been updated to resolve this specific issue: 12.3R12-S15, 12.3X48-D86, 12.3X48-D90, 14.1X53-D51, 15.1F6-S13,15.1R7-S5, 15.1X49-D181, 15.1X49-D190, 15.1X53-D238, 15.1X53-D592, 16.1R4-S13, 16.1R7-S5, 16.2R2-S10,17.1R2-S11, 17.1R3-S1, 17.2R1-S9, 17.2R3-S2, 17.3R2-S5, 17.3R3-S5, 17.4R2-S6, 17.4R3, 18.1R3-S7,18.2R2-S5, 18.2R3, 18.3R1-S6, 18.3R2-S1, 18.3R3, 18.4R1-S5, 18.4R2, 19.1R1-S2, 19.1R2, 19.2R1, and all subsequent releases.

This issue is being tracked as 1434553.

Workaround:

Access the J-Web service from trusted hosts which may not be compromised by cross-site scripting attacks, for example, deploying jump hosts with no internet access.

Alternatively, disable J-Web.

Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.
Modification History:
2020-01-08: Initial Publication.
2020-01-16: Adding reference to https://jvn.jp/en/jp/JVN21753370/
CVSS Score:
7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H)
Severity Level:
High
Acknowledgements:
The Juniper SIRT would like to would like to acknowledge and thank Toshitsugu Yoneyama of Mitsui Bussan Secure Directions, Inc. for finding and reporting this issue.

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