title: Junos OS: Privilege escalation vulnerability in dual REs, VC or HA cluster may allow unauthorized configuration change.
description: A privilege escalation vulnerability in Juniper Networks Junos OS devices configured with dual Routing Engines (RE), Virtual Chassis (VC) or high-availability cluster may allow a local authenticated low-privileged user with access to the shell to perform unauthorized configuration modification. This issue does not affect Junos OS device with single RE or stand-alone configuration. This issue affects Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S14; 12.3X48 versions prior to 12.3X48-D86, 12.3X48-D90; 14.1X53 versions prior to 14.1X53-D51; 15.1 versions prior to 15.1R7-S6; 15.1X49 versions prior to 15.1X49-D181, 15.1X49-D190; 15.1X53 versions prior to 15.1X53-D592; 16.1 versions prior to 16.1R4-S13, 16.1R7-S6; 16.2 versions prior to 16.2R2-S10; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R1-S9, 17.2R3-S3; 17.3 versions prior to 17.3R3-S6; 17.4 versions prior to 17.4R2-S6, 17.4R3; 18.1 versions prior to 18.1R3-S7; 18.2 versions prior to 18.2R2-S5, 18.2R3-S1; 18.2 versions prior to 18.2X75-D12, 18.2X75-D33, 18.2X75-D420, 18.2X75-D60, 18.2X75-D411; 18.3 versions prior to 18.3R1-S5, 18.3R2-S1, 18.3R3; 18.4 versions prior to 18.4R1-S4, 18.4R2-S1, 18.4R3; 19.1 versions prior to 19.1R1-S2, 19.1R2; 19.2 versions prior to 19.2R1-S1, 19.2R2.
problem types: CWE-264 Permissions, Privileges, and Access Controls
affected:
{
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 12.3R12-S14, status: affected, version: 12.3, versionType: custom
lessThan: 12.3X48-D86, 12.3X48-D90, status: affected, version: 12.3X48, versionType: custom
lessThan: 14.1X53-D51, status: affected, version: 14.1X53, versionType: custom
lessThan: 15.1R7-S6, status: affected, version: 15.1, versionType: custom
lessThan: 15.1X49-D181, 15.1X49-D190, status: affected, version: 15.1X49, versionType: custom
lessThan: 15.1X53-D592, status: affected, version: 15.1X53, versionType: custom
lessThan: 16.1R4-S13, 16.1R7-S6, status: affected, version: 16.1, versionType: custom
lessThan: 16.2R2-S10, status: affected, version: 16.2, versionType: custom
lessThan: 17.1R2-S11, 17.1R3-S1, status: affected, version: 17.1, versionType: custom
lessThan: 17.2R1-S9, 17.2R3-S3, status: affected, version: 17.2, versionType: custom
lessThan: 17.3R3-S6, status: affected, version: 17.3, versionType: custom
lessThan: 17.4R2-S6, 17.4R3, status: affected, version: 17.4, versionType: custom
lessThan: 18.1R3-S7, status: affected, version: 18.1, versionType: custom
changes: [at: 18.2X75-D12, 18.2X75-D33, 18.2X75-D420, 18.2X75-D60,18.2X75-D411, status: unaffected], lessThan: 18.2R2-S5, 18.2R3-S1, status: affected, version: 18.2, versionType: custom
lessThan: 18.3R1-S5, 18.3R2-S1, 18.3R3, status: affected, version: 18.3, versionType: custom
lessThan: 18.4R1-S4, 18.4R2-S1, 18.4R3, status: affected, version: 18.4, versionType: custom
lessThan: 19.1R1-S2, 19.1R2, status: affected, version: 19.1, versionType: custom
lessThan: 19.2R1-S1, 19.2R2, status: affected, version: 19.2, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: NONE
baseScore: 5
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: HIGH
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
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: 12.3R12-S14, 12.3X48-D86, 12.3X48-D90, 14.1X53-D51, 15.1R7-S6, 15.1X49-D181, 15.1X49-D190, 15.1X53-D592, 16.1R4-S13, 16.1R7-S6, 16.2R2-S10, 17.1R2-S11, 17.1R3-S1, 17.2R1-S9, 17.2R3-S3, 17.2X75-D110, 17.2X75-D44, 17.3R3-S6, 17.4R2-S6, 17.4R3, 18.1R3-S7, 18.2R2-S5, 18.2R3-S1, 18.2X75-D12, 18.2X75-D33, 18.2X75-D411, 18.2X75-D420, 18.2X75-D60, 18.3R1-S5, 18.3R1-S6, 18.3R2-S1, 18.3R2-S3, 18.3R3, 18.4R1-S4, 18.4R1-S5, 18.4R2-S1, 18.4R3, 19.1R1-S2, 19.1R2, 19.2R1-S1, 19.2R2, 19.3R1, and all subsequent releases.
workarounds: Disallow unprivileged authenticated users access to Junos shell.
Limit shell access to only trusted administrators.