CVE-2021-3321 Integer Underflow in Zephyr in IEEE 802154 Fragment Reassembly Header Removal
An integer underflow in Zephyr RTOS IEEE 802154 fragment reassembly can lead to buffer overflow, potentially allowing code execution or 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-2021-3321?
CVE-2021-3321 is a high-severity 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
Integer Underflow in Zephyr in IEEE 802154 Fragment Reassembly Header Removal. Zephyr versions >= >=2.4.0 contain Integer Overflow to Buffer Overflow (CWE-680). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-w44j-66g7-xw99
Which versions are affected by CVE-2021-3321?
It affects 1 product.
Products include Zephyrproject Zephyr.
How do I fix CVE-2021-3321?
No fix has been published for CVE-2021-3321 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-3321 being exploited?
There is no known exploitation of CVE-2021-3321 in the wild and no public exploit code.
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