CVE-2023-51393 Potential DoS due to BusFault and Assert in Ember ZNet legacy packet buffer
Attackers can cause a device crash and reboot by triggering uncontrolled resource consumption in the Ember ZNet SDK.
- 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-2023-51393?
CVE-2023-51393 is a medium-severity denial of service vulnerability in silabs.com Ember ZNet SDK, published on 23 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Due to an allocation of resources without limits, an uncontrolled resource consumption vulnerability exists in Silicon Labs Ember ZNet SDK prior to v7.4.0.0 (delivered as part of Silicon Labs Gecko SDK v4.4.0) which may enable attackers to trigger a bus fault and crash of the device, requiring a reboot in order to rejoin the network.
Weakness: CWE-770
Which versions are affected by CVE-2023-51393?
It affects 1 product.
Products include Silabs Emberznet.
How do I fix CVE-2023-51393?
No fix has been published for CVE-2023-51393 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-2023-51393 being exploited?
There is no known exploitation of CVE-2023-51393 in the wild and no public exploit code.
Other vulnerabilities in silabs.com Ember ZNet SDK
- CVE-2023-41094 Touchlink authentication bypass due to packets processed after timeout or out of range in Ember ZNet
- CVE-2026-85079 Out-of-bounds write in Zigbee Simple_Desc_req handling
- CVE-2026-94502 Out-of-bounds write in Zigbee Publish Price Matrix handling
- CVE-2026-4526 Global ZCL command parser missing minimum-length validation in EmberZNet v9.0.2
- CVE-2026-47145 Color Control hue/saturation assertion abort in EmberZNet v9.0.2
Sources
Also known as GHSA-r2ff-rrfq-r548.