CVE-2021-3454 Truncated L2CAP K-frame causes assertion failure
A truncated L2CAP K-frame triggers an assertion failure in Zephyr RTOS, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-3454?
CVE-2021-3454 is a medium-severity denial of service vulnerability in Zephyrproject Zephyr, published on 19 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Truncated L2CAP K-frame causes assertion failure. Zephyr versions >= 2.4.0, >= v.2.50 contain Improper Handling of Length Parameter Inconsistency (CWE-130), Reachable Assertion (CWE-617). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fx88-6c29-vrp3
Which versions are affected by CVE-2021-3454?
It affects 1 product.
Products include Zephyrproject Zephyr.
How do I fix CVE-2021-3454?
No fix has been published for CVE-2021-3454 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-2021-3454 being exploited?
There is no known exploitation of CVE-2021-3454 in the wild and no public exploit code.
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