title: Junos OS: A crafted MPLS packet may lead to a kernel crash
description: A specially crafted MPLS packet received or processed by the system, on an interface configured with MPLS, will store information in the system memory. Subsequently, if this stored information is accessed, this may result in a kernel crash leading to a denial of service. Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D71; 12.3 versions prior to 12.3R12-S7; 12.3X48 versions prior to 12.3X48-D55; 14.1 versions prior to 14.1R8-S5, 14.1R9; 14.1X53 versions prior to 14.1X53-D45, 14.1X53-D107; 14.2 versions prior to 14.2R7-S7, 14.2R8; 15.1 versions prior to 15.1F5-S8, 15.1F6-S8, 15.1R5-S6, 15.1R6-S3, 15.1R7; 15.1X49 versions prior to 15.1X49-D100; 15.1X53 versions prior to 15.1X53-D65, 15.1X53-D231; 16.1 versions prior to 16.1R3-S6, 16.1R4-S6, 16.1R5; 16.1X65 versions prior to 16.1X65-D45; 16.2 versions prior to 16.2R2-S1, 16.2R3; 17.1 versions prior to 17.1R2-S2, 17.1R3; 17.2 versions prior to 17.2R1-S3, 17.2R2; 17.2X75 versions prior to 17.2X75-D50. No other Juniper Networks products or platforms are affected by this issue.
problem types: Denial of Service
affected:
{
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 12.1X46-D71, status: affected, version: 12.1X46, versionType: custom
lessThan: 12.3R12-S7, status: affected, version: 12.3, versionType: custom
lessThan: 12.3X48-D55, status: affected, version: 12.3X48, versionType: custom
lessThan: 14.1R8-S5, 14.1R9, status: affected, version: 14.1, versionType: custom
lessThan: 14.1X53-D45, 14.1X53-D107, status: affected, version: 14.1X53, versionType: custom
lessThan: 14.2R7-S7, 14.2R8, status: affected, version: 14.2, versionType: custom
lessThan: 15.1F5-S8, 15.1F6-S8, 15.1R5-S6, 15.1R6-S3, 15.1R7, status: affected, version: 15.1, versionType: custom
lessThan: 15.1X49-D100, status: affected, version: 15.1X49, versionType: custom
lessThan: 15.1X53-D65, 15.1X53-D231, status: affected, version: 15.1X53, versionType: custom
lessThan: 16.1R3-S6, 16.1R4-S6, 16.1R5, status: affected, version: 16.1, versionType: custom
lessThan: 16.1X65-D45, status: affected, version: 16.1X65, versionType: custom
lessThan: 16.2R2-S1, 16.2R3, status: affected, version: 16.2, versionType: custom
lessThan: 17.1R2-S2, 17.1R3, status: affected, version: 17.1, versionType: custom
lessThan: 17.2R1-S3, 17.2R2, status: affected, version: 17.2, versionType: custom
lessThan: 17.2X75-D50, status: affected, version: 17.2X75, versionType: custom
}
metrics:
cvssV3_0: [
attackComplexity: LOW
attackVector: ADJACENT_NETWORK
availabilityImpact: HIGH
baseScore: 6.5
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
version: 3.0
]
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: 12.1X46-D71, 12.3R12-S7, 12.3X48-D55, 14.1R8-S5, 14.1R9, 14.1X53-D45, 14.1X53-D107, 14.2R7-S7, 14.2R8, 15.1F5-S8, 15.1F6-S8, 15.1R5-S6, 15.1R6-S3, 15.1R7, 15.1X49-D100, 15.1X53-D65, 15.1X53-D231, 16.1R3-S6, 16.1R4-S6, 16.1R5, 16.1R3-S6, 16.1R4-S6, 16.1R5, 16.1X65-D45, 16.2R2-S1, 16.2R3, 17.1R2-S2, 17.1R3, 17.2R1-S3, 17.2R2, 17.2X75-D50, 17.3R1, and all subsequent releases.
workarounds: Disallow MPLS packets from reaching the device.
Remove MPLS configuration stanzas from interface configurations that are at risk.
No other viable workarounds exist for this issue.