title: cSRX Series: Storing Passwords in a Recoverable Format and software permissions issues allows a local attacker to elevate privileges
description: On cSRX Series devices software permission issues in the container filesystem and stored files combined with storing passwords in a recoverable format in Juniper Networks Junos OS allows a local, low-privileged attacker to elevate their permissions to take control of any instance of a cSRX software deployment. This issue affects Juniper Networks Junos OS 20.2 version 20.2R1 and later versions prior to 21.2R1 on cSRX Series.
problem types: CWE-257 Storing Passwords in a Recoverable Format
affected:
{
vendor: Juniper Networks
product: Junos OS
versions:
version: unspecified, lessThan: 20.2R1, status: unaffected, versionType: custom
version: 20.2R1, status: affected, lessThan: 20.2*, versionType: custom
version: 20.3R1, status: affected, lessThan: 20.3*, versionType: custom
version: 20.4R1, status: affected, lessThan: 20.4*, versionType: custom
version: 21.1R1, status: affected, lessThan: 21.1*, versionType: custom
platforms: cSRX Series
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
attackVector: LOCAL
attackComplexity: LOW
privilegesRequired: LOW
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
baseScore: 7.8
baseSeverity: HIGH
]
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 21.2R1, and all subsequent releases.
Additionally, customers using Docker or Kubernetes must contact JTAC to receive additional guidance on applying commands manually to deployments to provide a complete fix.
workarounds: There are no viable workarounds for this issue.
To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to the cSRX instance to only trusted administrative networks, hosts and users.