title: Junos OS: A low privileged user can elevate their privileges to the ones of the highest privileged j-web user logged in
description: A Generation of Error Message Containing Sensitive Information vulnerability in the CLI of Juniper Networks Junos OS allows a locally authenticated attacker with low privileges to elevate these to the level of any other user logged in via J-Web at this time, potential leading to a full compromise of the device. This issue affects Juniper Networks Junos OS: All versions prior to 15.1R7-S11; 18.3 versions prior to 18.3R3-S6; 18.4 versions prior to 18.4R2-S9, 18.4R3-S10; 19.1 versions prior to 19.1R2-S3, 19.1R3-S7; 19.2 versions prior to 19.2R1-S8, 19.2R3-S4; 19.3 versions prior to 19.3R3-S4; 19.4 versions prior to 19.4R3-S6; 20.1 versions prior to 20.1R3-S2; 20.2 versions prior to 20.2R3-S3; 20.3 versions prior to 20.3R3-S1; 20.4 versions prior to 20.4R3-S1; 21.1 versions prior to 21.1R2-S1, 21.1R3; 21.2 versions prior to 21.2R1-S1, 21.2R2.
problem types: CWE-209 Information Exposure Through an Error Message
affected:
{
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 15.1R7-S11, status: affected, version: unspecified, versionType: custom
lessThan: 18.3R3-S6, status: affected, version: 18.3, versionType: custom
lessThan: 18.4R2-S9, 18.4R3-S10, status: affected, version: 18.4, versionType: custom
lessThan: 19.1R2-S3, 19.1R3-S7, status: affected, version: 19.1, versionType: custom
lessThan: 19.2R1-S8, 19.2R3-S4, status: affected, version: 19.2, versionType: custom
lessThan: 19.3R3-S4, status: affected, version: 19.3, versionType: custom
lessThan: 19.4R3-S6, status: affected, version: 19.4, versionType: custom
lessThan: 20.1R3-S2, status: affected, version: 20.1, versionType: custom
lessThan: 20.2R3-S3, status: affected, version: 20.2, versionType: custom
lessThan: 20.3R3-S1, status: affected, version: 20.3, versionType: custom
lessThan: 20.4R3-S1, status: affected, version: 20.4, versionType: custom
lessThan: 21.1R2-S1, 21.1R3, status: affected, version: 21.1, versionType: custom
lessThan: 21.2R1-S1, 21.2R2, status: affected, version: 21.2, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: HIGH
baseScore: 7.3
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/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-S11, 18.3R3-S6, 18.4R2-S9, 18.4R3-S10, 19.1R2-S3, 19.1R3-S7, 19.2R1-S8, 19.2R3-S4, 19.3R3-S4, 19.4R3-S6, 20.1R3-S2, 20.2R3-S3, 20.3R3-S1, 20.4R3-S1, 21.1R2-S1, 21.1R3, 21.2R1-S1, 21.2R2, 21.3R1, and all subsequent releases.
workarounds: There are no viable workarounds for this issue other than disabling J-Web.
To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to only trusted administrative networks, hosts and users.