title: Junos OS: SRX Series: Unified Access Control (UAC) bypass vulnerability
description: A vulnerability in Juniper Networks SRX Series device configured as a Junos OS Enforcer device may allow a user to access network resources that are not permitted by a UAC policy. This issue might occur when the IP address range configured in the Infranet Controller (IC) is configured as an IP address range instead of an IP address/netmask. See the Workaround section for more detail. The Junos OS Enforcer CLI settings are disabled by default. This issue affects Juniper Networks Junos OS on SRX Series: 12.3X48 versions prior to 12.3X48-D100; 15.1X49 versions prior to 15.1X49-D210; 17.3 versions prior to 17.3R2-S5, 17.3R3-S8; 17.4 versions prior to 17.4R2-S9, 17.4R3-S1; 18.1 versions prior to 18.1R3-S10; 18.2 versions prior to 18.2R2-S7, 18.2R3-S3; 18.3 versions prior to 18.3R1-S7, 18.3R3-S2; 18.4 versions prior to 18.4R1-S6, 18.4R2-S4, 18.4R3-S1; 19.1 versions prior to 19.1R1-S4, 19.1R2-S1, 19.1R3; 19.2 versions prior to 19.2R1-S3, 19.2R2; 19.3 versions prior to 19.3R2-S1, 19.3R3; 19.4 versions prior to 19.4R1-S1, 19.4R2.
problem types: CWE-288 Authentication Bypass Using an Alternate Path or Channel
affected:
{
platforms: SRX Series
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 12.3X48-D100, status: affected, version: 12.3X48, versionType: custom
lessThan: 15.1X49-D210, status: affected, version: 15.1X49, versionType: custom
lessThan: 17.3R2-S5, 17.3R3-S8, status: affected, version: 17.3, versionType: custom
lessThan: 17.4R2-S9, 17.4R3-S1, status: affected, version: 17.4, versionType: custom
lessThan: 18.1R3-S10, status: affected, version: 18.1, versionType: custom
lessThan: 18.2R2-S7, 18.2R3-S3, status: affected, version: 18.2, versionType: custom
lessThan: 18.3R1-S7, 18.3R3-S2, status: affected, version: 18.3, versionType: custom
lessThan: 18.4R1-S6, 18.4R2-S4, 18.4R3-S1, status: affected, version: 18.4, versionType: custom
lessThan: 19.1R1-S4, 19.1R2-S1, 19.1R3, status: affected, version: 19.1, versionType: custom
lessThan: 19.2R1-S3, 19.2R2, status: affected, version: 19.2, versionType: custom
lessThan: 19.3R2-S1, 19.3R3, status: affected, version: 19.3, versionType: custom
lessThan: 19.4R1-S1, 19.4R2, status: affected, version: 19.4, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 7.2
baseSeverity: HIGH
confidentialityImpact: LOW
integrityImpact: LOW
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/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: 12.3X48-D100, 15.1X49-D210, 16.1R7-S7, 17.3R2-S5, 17.3R3-S8, 17.4R2-S9, 17.4R3-S1, 18.1R3-S10, 18.2R3-S3, 18.3R1-S7, 18.3R3-S2, 18.4R1-S6, 18.4R2-S4, 18.4R3-S1, 19.1R1-S4, 19.1R2-S1, 19.1R3, 19.2R1-S3, 19.2R2, 19.3R2-S1, 19.3R3, 19.4R1-S1, 19.4R2, 20.1R1, and all subsequent releases.
workarounds: To avoid this issue, the IP address configuration in the IC Server should be configured as IP address/netmask, rather than an IP address range.
For example: configure 10.0.0.0/25 instead of 10.0.0.1-127.