An Uncontrolled Resource Consumption vulnerability in the kernel of Juniper Networks Junos OS allows an unauthenticated network based malicious user to cause 100% CPU load and the device to become unresponsive by sending a flood of traffic to the out-of-band management ethernet port. Continued receipted of a flood will create a sustained Denial of Service (DoS) condition. Once the flood subsides the system will recover by itself. An indication that the system is affected by this issue would be that an irq handled by the fman process is shown to be using a high percentage of CPU cycles like in the following example output: user@host> show system processes extensive ... PID USERNAME PRI NICE SIZE RES STATE TIME WCPU COMMAND 31 root -84 -187 0K 16K WAIT 22.2H 56939.26% irq96: fman0 This issue affects Juniper Networks Junos OS: All versions before 18.3R3-S6; 18.4 versions before 18.4R2-S9, 18.4R3-S9; 19.1 versions before 19.1R2-S3, 19.1R3-S7; 19.2 versions before 19.2R1-S7, 19.2R3-S3; 19.3 versions before 19.3R2-S7, 19.3R3-S4; 19.4 versions before 19.4R2-S5, 19.4R3-S5; 20.1 versions before 20.1R3-S1; 20.2 versions before 20.2R3-S2; 20.3 versions before 20.3R3-S1; 20.4 versions before 20.4R2-S2, 20.4R3; 21.1 versions before 21.1R2; 21.2 versions before 21.2R1-S1, 21.2R2.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
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juniper junos |
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juniper junos 18.3 |
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juniper junos 18.4 |
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juniper junos 19.1 |
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juniper junos 19.2 |
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juniper junos 19.3 |
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juniper junos 19.4 |
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juniper junos 20.1 |
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juniper junos 20.2 |
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juniper junos 20.3 |
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juniper junos 20.4 |
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juniper junos 21.1 |
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juniper junos 21.2 |
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