CVE-2021-3434 L2CAP: Stack based buffer overflow in le_ecred_conn_req()
A stack-based buffer overflow in the L2CAP protocol allows attackers to execute arbitrary code or cause a denial of service in Zephyr RTOS devices.
- 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-2021-3434?
CVE-2021-3434 is a medium-severity memory corruption vulnerability in Zephyrproject Zephyr, published on 28 Jun 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Stack based buffer overflow in le_ecred_conn_req(). Zephyr versions >= v2.5.0 Stack-based Buffer Overflow (CWE-121). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8w87-6rfp-cfrm
Which versions are affected by CVE-2021-3434?
It affects 1 product.
Products include Zephyrproject Zephyr.
How do I fix CVE-2021-3434?
No fix has been published for CVE-2021-3434 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-3434 being exploited?
There is no known exploitation of CVE-2021-3434 in the wild and no public exploit code.
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