A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) of Juniper Networks Junos OS on the QFX10K Series switches allows an malicious user to trigger a packet forwarding loop, leading to a partial Denial of Service (DoS). The issue is caused by DVMRP packets looping on a multi-homed Ethernet Segment Identifier (ESI) when VXLAN is configured. DVMRP packets received on a multi-homed ESI are sent to the peer, and then incorrectly forwarded out the same ESI, violating the split horizon rule. This issue only affects QFX10K Series switches, including the QFX10002, QFX10008, and QFX10016. Other products and platforms are unaffected by this vulnerability. This issue affects Juniper Networks Junos OS on QFX10K Series: 17.3 versions before 17.3R3-S12; 17.4 versions before 17.4R3-S5; 18.1 versions before 18.1R3-S13; 18.2 version 18.2R1 and later versions; 18.3 versions before 18.3R3-S5; 18.4 versions before 18.4R2-S9, 18.4R3-S8; 19.1 versions before 19.1R3-S5; 19.2 versions before 19.2R1-S7, 19.2R3-S2; 19.3 versions before 19.3R3-S2; 19.4 versions before 19.4R3-S3; 20.1 versions before 20.1R2-S2, 20.1R3; 20.2 versions before 20.2R3; 20.3 versions before 20.3R3; 20.4 versions before 20.4R2.
| 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 20.4 |
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