title: Junos OS: MX Series: MS-MPC/MIC might crash when processing malformed IPv6 packet in NAT64 configuration.
description: On Juniper Networks MX Series with MS-MIC or MS-MPC card configured with NAT64 configuration, receipt of a malformed IPv6 packet may crash the MS-PIC component on MS-MIC or MS-MPC. This issue occurs when a multiservice card is translating the malformed IPv6 packet to IPv4 packet. An unauthenticated attacker can continuously send crafted IPv6 packets through the device causing repetitive MS-PIC process crashes, resulting in an extended Denial of Service condition. This issue affects Juniper Networks Junos OS on MX Series: 15.1 versions prior to 15.1R7-S7; 15.1X53 versions prior to 15.1X53-D593; 16.1 versions prior to 16.1R7-S8; 17.2 versions prior to 17.2R3-S4; 17.3 versions prior to 17.3R3-S6; 17.4 versions prior to 17.4R2-S11, 17.4R3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.2X75 versions prior to 18.2X75-D41, 18.2X75-D430, 18.2X75-D53, 18.2X75-D65; 18.3 versions prior to 18.3R2-S4, 18.3R3; 18.4 versions prior to 18.4R2-S5, 18.4R3; 19.1 versions prior to 19.1R2; 19.2 versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2.
problem types: CWE-131 Incorrect Calculation of Buffer Size
affected:
{
platforms: MX Series
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 15.1R7-S7, status: affected, version: 15.1, versionType: custom
lessThan: 15.1X53-D593, status: affected, version: 15.1X53, versionType: custom
lessThan: 16.1R7-S8, status: affected, version: 16.1, versionType: custom
lessThan: 17.2R3-S4, status: affected, version: 17.2, versionType: custom
lessThan: 17.3R3-S6, status: affected, version: 17.3, versionType: custom
lessThan: 17.4R2-S11, 17.4R3, status: affected, version: 17.4, versionType: custom
lessThan: 18.1R3-S11, status: affected, version: 18.1, versionType: custom
lessThan: 18.2R3-S6, status: affected, version: 18.2, versionType: custom
lessThan: 18.2X75-D41, 18.2X75-D430, 18.2X75-D53, 18.2X75-D65, status: affected, version: 18.2X75, versionType: custom
lessThan: 18.3R2-S4, 18.3R3, status: affected, version: 18.3, versionType: custom
lessThan: 18.4R2-S5, 18.4R3, status: affected, version: 18.4, versionType: custom
lessThan: 19.1R2, status: affected, version: 19.1, versionType: custom
lessThan: 19.2R1-S5, 19.2R2, status: affected, version: 19.2, versionType: custom
lessThan: 19.3R2, status: affected, version: 19.3, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: LOW
baseScore: 5.3
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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: Junos OS 15.1R7-S7, 15.1X53-D593, 16.1R7-S8, 17.2R3-S4, 17.3R3-S6, 17.4R2-S11, 17.4R3, 18.1R3-S11, 18.2R3-S6, 18.2X75-D41, 18.2X75-D430, 18.2X75-D53, 18.2X75-D65, 18.3R2-S4, 18.3R3, 18.4R2-S5, 18.4R3, 19.1R2, 19.2R1-S5, 19.2R2, 19.3R2, 19.4R1, and all subsequent releases.
workarounds: There are no viable workarounds for this issue.