title: Junos OS: BGP session termination upon receipt of specific BGP FlowSpec advertisement.
description: 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: 12.3; 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.
problem types: CWE-710 Improper Adherence to Coding Standards
affected:
{
product: Junos OS
vendor: Juniper Networks
versions:
status: affected, version: 12.3
lessThan: 15.1R7-S5, status: affected, version: 15.1, versionType: custom
lessThan: 15.1F6-S13, status: affected, version: 15.1F, versionType: custom
lessThan: 16.1R7-S7, status: affected, version: 16.1, versionType: custom
lessThan: 17.1R2-S12, 17.1R3, status: affected, version: 17.1, versionType: custom
lessThan: 17.2R2-S7, 17.2R3, status: affected, version: 17.2, versionType: custom
lessThan: 17.2X75-D102, 17.2X75-D110, 17.2X75-D44, status: affected, version: 17.2X75, versionType: custom
lessThan: 17.3R2-S5, 17.3R3-S5, status: affected, version: 17.3, versionType: custom
lessThan: 17.4R1-S8, 17.4R2, status: affected, version: 17.4, versionType: custom
lessThan: 18.1R2-S4, 18.1R3, status: affected, version: 18.1, versionType: custom
lessThan: 18.2X75-D20, status: affected, version: 18.2X75, versionType: custom
}
{
platforms: SRX Series
product: Junos OS
vendor: Juniper Networks
versions:
status: affected, version: 12.3X48
lessThan: 15.1X49-D180, status: affected, version: 15.1X49, versionType: custom
}
{
platforms: EX and QFX Series
product: Junos OS
vendor: Juniper Networks
versions:
status: affected, version: 14.1X53
}
{
platforms: QFX5200/QFX5110
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 15.1X53-D238, status: affected, version: 15.1X53, versionType: custom
}
{
platforms: NFX Series
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 15.1X53-D497, status: affected, version: 15.1X53, versionType: custom
}
{
platforms: EX2300/EX3400
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 15.1X53-D592, status: affected, version: 15.1X53, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.6
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
version: 3.1
]
exploits: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
solutions: 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.
workarounds: There are no known workarounds for this issue.