title: Junos OS: SRX and EX Series: Local privilege escalation flaw in "download" functionality
description: An Improper Neutralization of Special Elements vulnerability in the download manager of Juniper Networks Junos OS on SRX Series and EX Series allows a locally authenticated attacker with low privileges to take full control over the device. One aspect of this vulnerability is that the attacker needs to be able to execute any of the "request ..." or "show system download ..." commands. This issue affects Juniper Networks Junos OS on SRX Series and EX Series: All versions prior to 19.2R1-S9, 19.2R3-S5; 19.3 versions prior to 19.3R3-S6; 19.4 versions prior to 19.4R3-S8; 20.1 versions prior to 20.1R3-S4; 20.2 versions prior to 20.2R3-S4; 20.3 versions prior to 20.3R3-S3; 20.4 versions prior to 20.4R3-S2, 20.4R3-S3; 21.1 versions prior to 21.1R3-S1; 21.2 versions prior to 21.2R2-S2, 21.2R3; 21.3 versions prior to 21.3R2, 21.3R3; 21.4 versions prior to 21.4R1-S1, 21.4R2.
problem types: 78
affected:
{
platforms: SRX Series, EX Series
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 19.1R3-S9, status: affected, version: unspecified, versionType: custom
lessThan: 19.2R1-S9, 19.2R3-S5, status: affected, version: 19.2, versionType: custom
lessThan: 19.3R3-S6, status: affected, version: 19.3, versionType: custom
lessThan: 19.4R3-S8, status: affected, version: 19.4, versionType: custom
lessThan: 20.1R3-S4, status: affected, version: 20.1, versionType: custom
lessThan: 20.2R3-S4, status: affected, version: 20.2, versionType: custom
lessThan: 20.3R3-S3, status: affected, version: 20.3, versionType: custom
lessThan: 20.4R3-S2, 20.4R3-S3, status: affected, version: 20.4, versionType: custom
lessThan: 21.1R3-S1, status: affected, version: 21.1, versionType: custom
lessThan: 21.2R2-S2, 21.2R3, status: affected, version: 21.2, versionType: custom
lessThan: 21.3R2, 21.3R3, status: affected, version: 21.3, versionType: custom
lessThan: 21.4R1-S1, 21.4R2, status: affected, version: 21.4, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: HIGH
baseScore: 7.8
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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: 19.1R3-S9, 19.2R1-S9, 19.2R3-S5, 19.4R3-S8, 20.2R3-S4, 20.3R3-S3, 20.4R3-S2, 20.4R3-S3, 21.1R3-S1, 21.2R2-S2, 21.2R3, 21.3R2, 21.3R3, 21.4R1-S1, 21.4R2, 22.1R1, and all subsequent releases.
workarounds: A workaround would be to deny users access to the "request system download ..." and "show system download ..." CLI commands.