CVE-2021-3330 RCE/DOS: Linked-list corruption leading to large out-of-bounds write while sorting for forged fragment list in Zephyr
Attackers can trigger remote code execution or denial of service via linked-list corruption in Zephyr RTOS network fragment handling.
- 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-2021-3330?
CVE-2021-3330 is a high-severity memory corruption vulnerability in Zephyrproject Zephyr, published on 12 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
RCE/DOS: Linked-list corruption leading to large out-of-bounds write while sorting for forged fragment list in Zephyr. Zephyr versions >= >=2.4.0 contain Out-of-bounds Write (CWE-787). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fj4r-373f-9456
Weakness: CWE-787
Which versions are affected by CVE-2021-3330?
It affects 1 product.
Products include Zephyrproject Zephyr.
How do I fix CVE-2021-3330?
No fix has been published for CVE-2021-3330 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-2021-3330 being exploited?
There is no known exploitation of CVE-2021-3330 in the wild and no public exploit code.
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