CVE-2017-4920 Denial of service in NSX-V Edge
A rogue OSPF LSA can cause routing loops and connectivity loss in VMware NSX-V Edge, requiring an upgrade to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-4920?
CVE-2017-4920 is a medium-severity denial of service vulnerability in VMware NSX-V Edge, published on 5 Dec 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-400
Which versions are affected by CVE-2017-4920?
It affects 1 product.
Products include Vmware Nsx-v Edge.
How do I fix CVE-2017-4920?
No fix has been published for CVE-2017-4920 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2017-4920 being exploited?
There is no known exploitation of CVE-2017-4920 in the wild and no public exploit code.
Sources
Also known as GHSA-qpm6-fwxq-72v2.