A vulnerability in processing of certain DHCP packets from adjacent clients on EX Series and QFX Series switches running Juniper Networks Junos OS with DHCP local/relay server configured may lead to exhaustion of DMA memory causing a Denial of Service (DoS). Over time, exploitation of this vulnerability may cause traffic to stop being forwarded, or to crashing of the fxpc process. When Packet DMA heap utilization reaches 99%, the system will become unstable. Packet DMA heap utilization can be monitored through the following command: user@junos# request pfe execute target fpc0 timeout 30 command "show heap" ID Base Total(b) Free(b) Used(b) % Name -- ---------- ----------- ----------- ----------- --- ----------- 0 213301a8 536870488 387228840 149641648 27 Kernel 1 91800000 8388608 3735120 4653488 55 DMA 2 92000000 75497472 74452192 1045280 1 PKT DMA DESC 3 d330000 335544320 257091400 78452920 23 Bcm_sdk 4 96800000 184549376 2408 184546968 99 Packet DMA <--- 5 903fffe0 20971504 20971504 0 0 Blob An indication of the issue occurring may be observed through the following log messages: Dec 10 08:07:00.124 2020 hostname fpc0 brcm_pkt_buf_alloc:523 (buf alloc) failed allocating packet buffer Dec 10 08:07:00.126 2020 hostname fpc0 (buf alloc) failed allocating packet buffer Dec 10 08:07:00.128 2020 hostname fpc0 brcm_pkt_buf_alloc:523 (buf alloc) failed allocating packet buffer Dec 10 08:07:00.130 2020 hostnameC fpc0 (buf alloc) failed allocating packet buffer This issue affects Juniper Networks Junos OS on EX Series and QFX Series: 17.4R3 versions prior to 17.4R3-S3; 18.1R3 versions between 18.1R3-S6 and 18.1R3-S11; 18.2R3 versions prior to 18.2R3-S6; 18.3R3 versions prior to 18.3R3-S4; 18.4R2 versions prior to 18.4R2-S5; 18.4R3 versions prior to 18.4R3-S6; 19.1 versions between 19.1R2 and 19.1R3-S3; 19.2 versions prior to 19.2R3-S1; 19.3 versions prior to 19.3R2-S5, 19.3R3; 19.4 versions prior to 19.4R2-S2, 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R1-S2, 20.2R2. Junos OS versions prior to 17.4R3 are unaffected by this vulnerability.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.4, indicating it requires adjacent network access 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 21 products from juniper, from juniper, from juniper and 18 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2021, 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.
2021-01-15T18:15:15.417
2024-11-21T05:42:13.660
Modified
CVSSv3.1: 7.4 (HIGH)
AV:A/AC:L/Au:N/C:N/I:N/A:P
6.5
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | juniper | junos | 17.4 | Yes |
| Operating System | juniper | junos | 17.4 | Yes |
| Operating System | juniper | junos | 17.4 | Yes |
| Operating System | juniper | junos | 18.1 | Yes |
| Operating System | juniper | junos | 18.1 | Yes |
| Operating System | juniper | junos | 18.1 | Yes |
| Operating System | juniper | junos | 18.1 | Yes |
| Operating System | juniper | junos | 18.2 | Yes |
| Operating System | juniper | junos | 18.2 | Yes |
| Operating System | juniper | junos | 18.2 | Yes |
| Operating System | juniper | junos | 18.2 | Yes |
| Operating System | juniper | junos | 18.2 | Yes |
| Operating System | juniper | junos | 18.2 | Yes |
| Operating System | juniper | junos | 18.3 | Yes |
| Operating System | juniper | junos | 18.3 | Yes |
| Operating System | juniper | junos | 18.3 | Yes |
| Operating System | juniper | junos | 18.3 | Yes |
| Operating System | juniper | junos | 18.4 | Yes |
| Operating System | juniper | junos | 18.4 | Yes |
| Operating System | juniper | junos | 18.4 | Yes |
| Operating System | juniper | junos | 18.4 | Yes |
| Operating System | juniper | junos | 18.4 | Yes |
| Operating System | juniper | junos | 19.1 | Yes |
| Operating System | juniper | junos | 19.1 | Yes |
| Operating System | juniper | junos | 19.1 | Yes |
| Operating System | juniper | junos | 19.1 | Yes |
| Operating System | juniper | junos | 19.2 | Yes |
| Operating System | juniper | junos | 19.2 | Yes |
| Operating System | juniper | junos | 19.2 | Yes |
| Operating System | juniper | junos | 19.2 | Yes |
| Operating System | juniper | junos | 19.2 | Yes |
| Operating System | juniper | junos | 19.2 | Yes |
| Operating System | juniper | junos | 19.2 | Yes |
| Operating System | juniper | junos | 19.2 | Yes |
| Operating System | juniper | junos | 19.3 | Yes |
| Operating System | juniper | junos | 19.3 | Yes |
| Operating System | juniper | junos | 19.3 | Yes |
| Operating System | juniper | junos | 19.3 | Yes |
| Operating System | juniper | junos | 19.3 | Yes |
| Operating System | juniper | junos | 19.3 | Yes |
| Operating System | juniper | junos | 19.3 | Yes |
| Operating System | juniper | junos | 19.3 | Yes |
| Operating System | juniper | junos | 19.4 | Yes |
| Operating System | juniper | junos | 19.4 | Yes |
| Operating System | juniper | junos | 19.4 | Yes |
| Operating System | juniper | junos | 19.4 | Yes |
| Operating System | juniper | junos | 19.4 | Yes |
| Operating System | juniper | junos | 20.1 | Yes |
| Operating System | juniper | junos | 20.1 | Yes |
| Operating System | juniper | junos | 20.1 | Yes |
| Operating System | juniper | junos | 20.1 | Yes |
| Operating System | juniper | junos | 20.2 | Yes |
| Operating System | juniper | junos | 20.2 | Yes |
| Hardware | juniper | ex2300 | - | No |
| Hardware | juniper | ex2300-c | - | No |
| Hardware | juniper | ex2300m | - | No |
| Hardware | juniper | ex3400 | - | No |
| Hardware | juniper | ex4300 | - | No |
| Hardware | juniper | ex4300m | - | No |
| Hardware | juniper | ex4600 | - | No |
| Hardware | juniper | ex4650 | - | No |
| Hardware | juniper | ex9200 | - | No |
| Hardware | juniper | ex9250 | - | No |
| Hardware | juniper | qfx10002 | - | No |
| Hardware | juniper | qfx10008 | - | No |
| Hardware | juniper | qfx10016 | - | No |
| Hardware | juniper | qfx5100 | - | No |
| Hardware | juniper | qfx5110 | - | No |
| Hardware | juniper | qfx5120 | - | No |
| Hardware | juniper | qfx5130 | - | No |
| Hardware | juniper | qfx5200 | - | No |
| Hardware | juniper | qfx5210 | - | No |
| Hardware | juniper | qfx5220 | - | 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.