title: Junos OS: SRX Series: A weakness in the Veriexec subsystem may allow privilege escalation.
description: A vulnerability in the Veriexec subsystem of Juniper Networks Junos OS allowing an attacker to fully compromise the host system. A local authenticated user can elevate privileges to gain full control of the system even if they are specifically denied access to perform certain actions. This issue affects: Juniper Networks Junos OS: 12.3X48 versions prior to 12.3X48-D80 on SRX Series.
problem types: 252 - Unchecked Return Value
affected:
{
platforms: SRX Series
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 12.3X48-D80, status: affected, version: 12.3X48, 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: Junos OS: 12.3X48-D80 and all subsequent releases.
workarounds: To reduce the risk of exploitation of this vulnerability, customers should limit access to the Junos shell to only trusted administrators and limit their actions to previously reviewed and agreed-upon commands and command arguments as part of a structured change management workflow.  Shell commands which are run should be logged and reviewed as part of standard security practices.