Any Juniper Networks SRX series device with one or more ALGs enabled may experience a flowd crash when traffic is processed by the Sun/MS-RPC ALGs. This vulnerability in the Sun/MS-RPC ALG services component of Junos OS allows an attacker to cause a repeated denial of service against the target. Repeated traffic in a cluster may cause repeated flip-flop failure operations or full failure to the flowd daemon halting traffic on all nodes. Only IPv6 traffic is affected by this issue. IPv4 traffic is unaffected. This issues is not seen with to-host traffic. This issue has no relation with HA services themselves, only the ALG service. No other Juniper Networks products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS 12.1X46 prior to 12.1X46-D55 on SRX; 12.1X47 prior to 12.1X47-D45 on SRX; 12.3X48 prior to 12.3X48-D32, 12.3X48-D35 on SRX; 15.1X49 prior to 15.1X49-D60 on SRX.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 13 products from juniper, from juniper, from juniper and 10 others, 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.
2017-10-13T17:29:00.533
2025-04-20T01:37:25.860
Deferred
CVSSv3.0: 7.5 (HIGH)
AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
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 |
| Hardware | juniper | srx110 | - | No |
| Hardware | juniper | srx1400 | - | No |
| Hardware | juniper | srx1500 | - | No |
| Hardware | juniper | srx220 | - | No |
| Hardware | juniper | srx300 | - | No |
| Hardware | juniper | srx3400 | - | No |
| Hardware | juniper | srx3600 | - | No |
| Hardware | juniper | srx4000 | - | No |
| Hardware | juniper | srx5400 | - | No |
| Hardware | juniper | srx550 | - | No |
| Hardware | juniper | srx5600 | - | No |
| Hardware | juniper | srx5800 | - | No |
| Operating System | juniper | junos | 12.1x47 | Yes |
| Operating System | juniper | junos | 12.1x47 | Yes |
| Operating System | juniper | junos | 12.1x47 | Yes |
| Operating System | juniper | junos | 12.1x47 | Yes |
| Operating System | juniper | junos | 12.1x47 | Yes |
| Operating System | juniper | junos | 12.1x47 | Yes |
| Operating System | juniper | junos | 12.1x47 | Yes |
| Hardware | juniper | srx110 | - | No |
| Hardware | juniper | srx1400 | - | No |
| Hardware | juniper | srx1500 | - | No |
| Hardware | juniper | srx220 | - | No |
| Hardware | juniper | srx300 | - | No |
| Hardware | juniper | srx3400 | - | No |
| Hardware | juniper | srx3600 | - | No |
| Hardware | juniper | srx4000 | - | No |
| Hardware | juniper | srx5400 | - | No |
| Hardware | juniper | srx550 | - | No |
| Hardware | juniper | srx5600 | - | No |
| Hardware | juniper | srx5800 | - | No |
| 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 | 12.3x48 | Yes |
| Hardware | juniper | srx110 | - | No |
| Hardware | juniper | srx1400 | - | No |
| Hardware | juniper | srx1500 | - | No |
| Hardware | juniper | srx220 | - | No |
| Hardware | juniper | srx300 | - | No |
| Hardware | juniper | srx3400 | - | No |
| Hardware | juniper | srx3600 | - | No |
| Hardware | juniper | srx4000 | - | No |
| Hardware | juniper | srx5400 | - | No |
| Hardware | juniper | srx550 | - | No |
| Hardware | juniper | srx5600 | - | No |
| Hardware | juniper | srx5800 | - | No |
| 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 |
| Hardware | juniper | srx110 | - | No |
| Hardware | juniper | srx1400 | - | No |
| Hardware | juniper | srx1500 | - | No |
| Hardware | juniper | srx220 | - | No |
| Hardware | juniper | srx300 | - | No |
| Hardware | juniper | srx3400 | - | No |
| Hardware | juniper | srx3600 | - | No |
| Hardware | juniper | srx4000 | - | No |
| Hardware | juniper | srx5400 | - | No |
| Hardware | juniper | srx550 | - | No |
| Hardware | juniper | srx5600 | - | No |
| Hardware | juniper | srx5800 | - | 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.