A vulnerability in a specific loopback filter action command, processed in a specific logical order of operation, in a running configuration of Juniper Networks Junos OS, allows an attacker with CLI access and the ability to initiate remote sessions to the loopback interface with the defined action, to hang the kernel. Affected releases are Juniper Networks Junos OS 12.1X46 prior to 12.1X46-D55; 12.3X48 prior to 12.3X48-D35; 14.1 prior to 14.1R8-S4, 14.1R9; 14.1X53 prior to 14.1X53-D40; 14.2 prior to 14.2R4-S9, 14.2R7-S8, 14.2R8; 15.1 prior to 15.1F5-S3, 15.1F6, 15.1R4; 15.1X49 prior to 15.1X49-D60; 15.1X53 prior to 15.1X53-D47; 16.1 prior to 16.1R2. No other Juniper Networks products or platforms are affected by this issue.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.5, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 1 product from juniper organizations running these solutions should prioritize assessment and patching.
First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2017-10-13T17:29:00.677
2025-04-20T01:37:25.860
Deferred
CVSSv3.0: 5.5 (MEDIUM)
AV:L/AC:L/Au:N/C:N/I:N/A:P
3.9
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | juniper | junos | 12.1x46 | Yes |
| Operating System | juniper | junos | 12.1x46 | Yes |
| Operating System | juniper | junos | 12.1x46 | Yes |
| Operating System | juniper | junos | 12.1x46 | Yes |
| Operating System | juniper | junos | 12.1x46 | Yes |
| Operating System | juniper | junos | 12.1x46 | Yes |
| Operating System | juniper | junos | 12.1x46 | Yes |
| Operating System | juniper | junos | 12.1x46 | Yes |
| Operating System | juniper | junos | 12.1x46 | Yes |
| Operating System | juniper | junos | 12.1x46 | Yes |
| Operating System | juniper | junos | 12.3x48 | Yes |
| Operating System | juniper | junos | 12.3x48 | Yes |
| Operating System | juniper | junos | 12.3x48 | Yes |
| Operating System | juniper | junos | 12.3x48 | Yes |
| Operating System | juniper | junos | 12.3x48 | Yes |
| Operating System | juniper | junos | 14.1 | Yes |
| Operating System | juniper | junos | 14.1 | Yes |
| Operating System | juniper | junos | 14.1 | Yes |
| Operating System | juniper | junos | 14.1 | Yes |
| Operating System | juniper | junos | 14.1 | Yes |
| Operating System | juniper | junos | 14.1 | Yes |
| Operating System | juniper | junos | 14.1 | Yes |
| Operating System | juniper | junos | 14.1 | Yes |
| Operating System | juniper | junos | 14.1 | Yes |
| Operating System | juniper | junos | 14.1x53 | Yes |
| Operating System | juniper | junos | 14.1x53 | Yes |
| Operating System | juniper | junos | 14.1x53 | Yes |
| Operating System | juniper | junos | 14.1x53 | Yes |
| Operating System | juniper | junos | 14.1x53 | Yes |
| Operating System | juniper | junos | 14.1x53 | Yes |
| Operating System | juniper | junos | 14.1x53 | Yes |
| Operating System | juniper | junos | 14.1x53 | Yes |
| Operating System | juniper | junos | 14.1x53 | Yes |
| Operating System | juniper | junos | 14.2 | Yes |
| Operating System | juniper | junos | 14.2 | Yes |
| Operating System | juniper | junos | 14.2 | Yes |
| Operating System | juniper | junos | 14.2 | Yes |
| Operating System | juniper | junos | 14.2 | Yes |
| Operating System | juniper | junos | 14.2 | Yes |
| Operating System | juniper | junos | 14.2 | Yes |
| Operating System | juniper | junos | 15.1 | Yes |
| Operating System | juniper | junos | 15.1 | Yes |
| Operating System | juniper | junos | 15.1 | Yes |
| Operating System | juniper | junos | 15.1 | Yes |
| Operating System | juniper | junos | 15.1 | Yes |
| Operating System | juniper | junos | 15.1 | Yes |
| Operating System | juniper | junos | 15.1 | Yes |
| Operating System | juniper | junos | 15.1 | Yes |
| Operating System | juniper | junos | 15.1 | Yes |
| Operating System | juniper | junos | 15.1 | Yes |
| Operating System | juniper | junos | 15.1 | Yes |
| Operating System | juniper | junos | 15.1 | Yes |
| Operating System | juniper | junos | 15.1x49 | Yes |
| Operating System | juniper | junos | 15.1x49 | Yes |
| Operating System | juniper | junos | 15.1x49 | Yes |
| Operating System | juniper | junos | 15.1x49 | Yes |
| Operating System | juniper | junos | 15.1x49 | Yes |
| Operating System | juniper | junos | 15.1x49 | Yes |
| Operating System | juniper | junos | 15.1x49 | Yes |
| Operating System | juniper | junos | 15.1x49 | Yes |
| Operating System | juniper | junos | 15.1x49 | Yes |
| Operating System | juniper | junos | 15.1x53 | Yes |
| Operating System | juniper | junos | 15.1x53 | Yes |
| Operating System | juniper | junos | 15.1x53 | Yes |
| Operating System | juniper | junos | 15.1x53 | Yes |
| Operating System | juniper | junos | 15.1x53 | Yes |
| Operating System | juniper | junos | 15.1x53 | Yes |
| Operating System | juniper | junos | 15.1x53 | Yes |
| Operating System | juniper | junos | 15.1x53 | Yes |
| Operating System | juniper | junos | 15.1x53 | Yes |
| Operating System | juniper | junos | 16.1 | Yes |
| Operating System | juniper | junos | 16.1 | Yes |
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.