CVE-2017-4920

Severity: medium (CVSS 5.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-12-05 · updated 2026-06-17
Weakness: CWE-400

Description

The implementation of the OSPF protocol in VMware NSX-V Edge 6.2.x prior to 6.2.8 and NSX-V Edge 6.3.x prior to 6.3.3 doesn't correctly handle the link-state advertisement (LSA). A rogue LSA may exploit this issue resulting in continuous sending of LSAs between two routers eventually going in loop or loss of connectivity.

Affected products

VMware NSX-V Edge: from 6.2.0 before 6.2.8; from 6.3.0 before 6.3.3 — fixed in 6.2.8, 6.3.3
VMware NSX-V Edge: from 6.2.x prior through 6.2.8; from 6.3.x prior through 6.3.3

How to fix

Upgrade to a fixed version: VMware NSX-V Edge 6.2.8, 6.3.3. Check the vendor advisory for mitigations.

References

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