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2020-04 Security Bulletin: Junos OS: BGP session termination upon receipt of specific BGP FlowSpec advertisement. (CVE-2020-1613)



Article ID: JSA10996 SECURITY_ADVISORIES Last Updated: 08 Apr 2020Version: 1.0
Product Affected:
This issue affects Junos OS 12.3, 12.3X48, 14.1X53, 15.1, 15.1F, 15.1X49, 15.1X53, 16.1, 17.1, 17.2, 17.2X75, 17.3, 17.4, 18.1, 18.2X75.

A vulnerability in the BGP FlowSpec implementation may cause a Juniper Networks Junos OS device to terminate an established BGP session upon receiving a specific BGP FlowSpec advertisement.

The BGP NOTIFICATION message that terminates an established BGP session is sent toward the peer device that originally sent the specific BGP FlowSpec advertisement.

This specific BGP FlowSpec advertisement received from a BGP peer might get propagated from a Junos OS device running the fixed release to another device that is vulnerable causing BGP session termination downstream.

This issue affects IPv4 and IPv6 BGP FlowSpec deployment.

This issue affects Juniper Networks Junos OS:


12.3X48 on SRX Series;

14.1X53 on EX and QFX Series;

15.1 versions prior to 15.1R7-S5;

15.1F versions prior to 15.1F6-S13;

15.1X49 versions prior to 15.1X49-D180 on SRX Series;

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

15.1X53 versions prior to 15.1X53-D497 on NFX Series;

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

16.1 versions prior to 16.1R7-S7;

17.1 versions prior to 17.1R2-S12, 17.1R3;

17.2 versions prior to 17.2R2-S7, 17.2R3;

17.2X75 versions prior to 17.2X75-D102, 17.2X75-D110, 17.2X75-D44;

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

17.4 versions prior to 17.4R1-S8, 17.4R2;

18.1 versions prior to 18.1R2-S4, 18.1R3;

18.2X75 versions prior to 18.2X75-D20.

This issue affects Junos OS devices with the BGP FlowSpec configured:

[procotol bgp ... family inet flow]

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was seen during production usage.

This issue has been assigned CVE-2020-1613.


The following software releases have been updated to resolve this specific issue: 15.1R7-S5, 15.1F6-S13, 15.1X49-D180, 15.1X53-D238, 15.1X53-D497, 15.1X53-D592, 16.1R7-S7, 17.1R3,17.2R2-S7, 17.2R3,17.2X75-D102, 17.2X75-D110, 17.3R3-S5, 17.4R1-S8, 17.4R2, 18.1R2-S4, 18.1R3, 18.2X75-D20, 18.2R1, and all subsequent releases.

This issue is being tracked as 1323474.


There are no known workarounds for this issue.

Software Releases, patches and updates are available at
Modification History:
‚Äč2020-04-08: Initial publication
CVSS Score:
8.6 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
Severity Level:
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

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