CVE-2021-3321: Integer Underflow in Zephyr in IEEE 802154 Fragment Reassembly Header Removal
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
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
zephyrto a version that resolves this vulnerability.Fixed in 2.4.0 - Compensating control
Apply the fix referenced by the Zephyr security advisory GHSA-w44j-66g7-xw99 for the IEEE 802154 Fragment Reassembly Header Removal integer underflow issue.
Event History
Frequently Asked Questions
What is CVE-2021-3321?
CVE-2021-3321 is a vulnerability in Zephyr that allows for an integer underflow leading to a buffer overflow.
What is the severity of CVE-2021-3321?
The severity of CVE-2021-3321 is high with a CVSS score of 8.8.
What is the affected software for CVE-2021-3321?
The affected software for CVE-2021-3321 is Zephyr versions 2.4.0 to 2.5.0.
How can I fix CVE-2021-3321?
To fix CVE-2021-3321, it is recommended to upgrade to a version of Zephyr that is not affected by the vulnerability.
Where can I find more information about CVE-2021-3321?
You can find more information about CVE-2021-3321 at the following link: http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-w44j-66g7-xw99