Due to a vulnerability in DDoS protection in Juniper Networks Junos OS and Junos OS Evolved on QFX5K Series switches in a VXLAN configuration, instability might be experienced in the underlay network as a consequence of exceeding the default ddos-protection aggregate threshold. If an attacker on a client device on the overlay network sends a high volume of specific, legitimate traffic in the overlay network, due to an improperly detected DDoS violation, the leaf might not process certain L2 traffic, sent by spines in the underlay network. Continued receipt and processing of the high volume traffic will sustain the Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on QFX5K Series: 17.3 versions before 17.3R3-S11; 17.4 versions before 17.4R3-S5; 18.1 versions before 18.1R3-S13; 18.2 versions before 18.2R2-S8, 18.2R3-S8; 18.3 versions before 18.3R3-S5; 18.4 versions before 18.4R1-S8, 18.4R2-S6, 18.4R3-S6; 19.1 versions before 19.1R3-S4; 19.2 versions before 19.2R1-S6, 19.2R3-S2; 19.3 versions before 19.3R3-S2; 19.4 versions before 19.4R2-S4, 19.4R3-S1; 20.1 versions before 20.1R2; 20.2 versions before 20.2R2; 20.3 versions before 20.3R1-S2, 20.3R2. Juniper Networks Junos OS Evolved on QFX5220: All versions before 20.3R2-EVO.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
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juniper junos 17.3 |
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juniper junos 17.4 |
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juniper junos 18.1 |
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juniper junos 18.2 |
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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_os_evolved 18.3 |
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juniper junos_os_evolved 19.1 |
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juniper junos_os_evolved 19.2 |
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juniper junos_os_evolved 19.3 |
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juniper junos_os_evolved 20.1 |
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juniper junos_os_evolved 20.2 |
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juniper junos_os_evolved 20.3 |
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