A Missing Authentication for Critical Function vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series with SPC3, and SRX Series allows an unauthenticated network-based attacker to cause limited impact to the integrity or availability of the device. If a device is configured with IPsec authentication algorithm hmac-sha-384 or hmac-sha-512, tunnels are established normally but for traffic traversing the tunnel no authentication information is sent with the encrypted data on egress, and no authentication information is expected on ingress. So if the peer is an unaffected device transit traffic is going to fail in both directions. If the peer is an also affected device transit traffic works, but without authentication, and configuration and CLI operational commands indicate authentication is performed. This issue affects Junos OS: * All versions before 20.4R3-S7, * 21.1 versions before 21.1R3, * 21.2 versions before 21.2R2-S1, 21.2R3, * 21.3 versions before 21.3R1-S2, 21.3R2.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 4.8, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited integrity, and limited availability for affected systems. Impacting 38 products from juniper, from juniper, from juniper and 35 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2024, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2024-04-12T16:15:38.773
2025-04-11T14:09:43.030
Analyzed
CVSSv3.1: 4.8 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | juniper | junos | < 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Hardware | juniper | csrx | - | No |
| Hardware | juniper | mx240 | - | No |
| Hardware | juniper | mx480 | - | No |
| Hardware | juniper | mx960 | - | No |
| Hardware | juniper | srx100 | - | No |
| Hardware | juniper | srx110 | - | No |
| Hardware | juniper | srx1400 | - | No |
| Hardware | juniper | srx1500 | - | No |
| Hardware | juniper | srx1600 | - | No |
| Hardware | juniper | srx210 | - | No |
| Hardware | juniper | srx220 | - | No |
| Hardware | juniper | srx2300 | - | No |
| Hardware | juniper | srx240 | - | No |
| Hardware | juniper | srx240h2 | - | No |
| Hardware | juniper | srx240m | - | No |
| Hardware | juniper | srx300 | - | No |
| Hardware | juniper | srx320 | - | No |
| Hardware | juniper | srx340 | - | No |
| Hardware | juniper | srx3400 | - | No |
| Hardware | juniper | srx345 | - | No |
| Hardware | juniper | srx3600 | - | No |
| Hardware | juniper | srx380 | - | No |
| Hardware | juniper | srx4000 | - | No |
| Hardware | juniper | srx4100 | - | No |
| Hardware | juniper | srx4200 | - | No |
| Hardware | juniper | srx4300 | - | No |
| Hardware | juniper | srx4600 | - | No |
| Hardware | juniper | srx4700 | - | No |
| Hardware | juniper | srx5000 | - | No |
| Hardware | juniper | srx5400 | - | No |
| Hardware | juniper | srx550 | - | No |
| Hardware | juniper | srx550_hm | - | No |
| Hardware | juniper | srx550m | - | No |
| Hardware | juniper | srx5600 | - | No |
| Hardware | juniper | srx5800 | - | No |
| Hardware | juniper | srx650 | - | No |
| Hardware | juniper | vsrx | - | No |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For juniper's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.