A buffer overflow vulnerability in the TCP/IP stack of Juniper Networks Junos OS allows an attacker to send specific sequences of packets to the device thereby causing a Denial of Service (DoS). By repeatedly sending these sequences of packets to the device, an attacker can sustain the Denial of Service (DoS) condition. The device will abnormally shut down as a result of these sent packets. A potential indicator of compromise will be the following message in the log files: "eventd[13955]: SYSTEM_ABNORMAL_SHUTDOWN: System abnormally shut down" This issue is only triggered by traffic destined to the device. Transit traffic will not trigger this issue. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S19; 15.1 versions prior to 15.1R7-S10; 17.3 versions prior to 17
The following software releases have been updated to resolve this specific issue: 12.3R12-S19, 15.1R7-S10, 17.3R3-S12, 18.4R2-S9, 18.4R3-S9, 19.1R3-S7, 19.2R1-S7, 19.2R3-S3, 19.3R2-S7, 19.3R3-S3, 19.4R3-S5, 20.1R3-S1, 20.2R3-S2, 20.3R3-S1, 20.4R2-S2, 20.4R3, 21.1R2, 21.2R1-S1, 21.2R2, 21.3R1, and all subsequent releases.
There are no available workarounds for this issue. To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to the device to only trusted administrative networks, hosts and users.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | >=12.3<12.3R12-S19 | 12.3R12-S19 | advisory ↗ |
| Juniper Networks Junos OS | >=15.1<15.1R7-S10 | 15.1R7-S10 | advisory ↗ |
| Juniper Networks Junos OS | >=17.3<17.3R3-S12 | 17.3R3-S12 | advisory ↗ |
| Juniper Networks Junos OS | >=18.4<18.4R2-S9, 18.4R3-S9 | 18.4R2-S9, 18.4R3-S9 | advisory ↗ |
| Juniper Networks Junos OS | >=19.1<19.1R3-S7 | 19.1R3-S7 | advisory ↗ |
| Juniper Networks Junos OS | >=19.2<19.2R1-S7, 19.2R3-S3 | 19.2R1-S7, 19.2R3-S3 | advisory ↗ |
| Juniper Networks Junos OS | >=19.3<19.3R2-S7, 19.3R3-S3 | 19.3R2-S7, 19.3R3-S3 | advisory ↗ |
| Juniper Networks Junos OS | >=19.4<19.4R3-S5 | 19.4R3-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=20.1<20.1R3-S1 | 20.1R3-S1 | advisory ↗ |
| Juniper Networks Junos OS | >=20.2<20.2R3-S2 | 20.2R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=20.3<20.3R3-S1 | 20.3R3-S1 | advisory ↗ |
| Juniper Networks Junos OS | >=20.4<20.4R2-S2, 20.4R3 | 20.4R2-S2, 20.4R3 | advisory ↗ |
| Juniper Networks Junos OS | >=21.1<21.1R2 | 21.1R2 | advisory ↗ |
| Juniper Networks Junos OS | >=21.2<21.2R1-S1, 21.2R2 | 21.2R1-S1, 21.2R2 | advisory ↗ |