title: Junos OS: SNMP fails to properly perform authorization checks on incoming received SNMP requests.
description: An improper authorization vulnerability in the Simple Network Management Protocol daemon (snmpd) service of Juniper Networks Junos OS leads an unauthenticated attacker being able to perform SNMP read actions, an Exposure of System Data to an Unauthorized Control Sphere, or write actions to OIDs that support write operations, against the device without authentication. This issue affects: Juniper Networks Junos OS: 17.2 version 17.2R1 and later versions; 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S12, 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R1-S8, 18.4R2-S5, 18.4R3; 19.1 versions prior to 19.1R2; 19.2 versions prior to 19.2R1-S6, 19.2R2; 19.3 versions prior to 19.3R2. This issue does not affect Juniper Networks Junos OS versions prior to 17.2R1.
problem types: CWE-285 Improper Authorization
affected:
{
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 17.2R1, status: unaffected, version: unspecified, versionType: custom
lessThan: 17.2*, status: affected, version: 17.2R1, versionType: custom
lessThan: 17.3R3-S9, status: affected, version: 17.3, versionType: custom
lessThan: 17.4R2-S12, 17.4R3-S5, status: affected, version: 17.4, versionType: custom
lessThan: 18.1R3-S13, status: affected, version: 18.1, versionType: custom
lessThan: 18.2R3-S8, status: affected, version: 18.2, versionType: custom
lessThan: 18.3R3-S5, status: affected, version: 18.3, versionType: custom
lessThan: 18.4R1-S8, 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-S6, 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: 7.3
baseSeverity: HIGH
confidentialityImpact: LOW
integrityImpact: LOW
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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: 17.3R3-S9, 17.4R2-S12, 17.4R3-S5, 18.1R3-S13, 18.2R3-S8, 18.3R3-S5, 18.4R1-S8, 18.4R2-S5, 18.4R3, 19.1R2, 19.2R1-S6, 19.2R2, 19.3R2, 19.4R1, and all subsequent releases.
workarounds: The following workaround command will disable SNMP support for the mgmt_junos routing interface and protect the device from being exploited:
# set snmp disable-mgmt-junos-support