CVE-2021-3323 — HIGH (8.3) — White Hats Nepal

Vulnerability Description

Integer Underflow in 6LoWPAN IPHC Header Uncompression in Zephyr. Zephyr versions >= >=2.4.0 contain Integer Underflow (Wrap or Wraparound) (CWE-191). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-89j6-qpxf-pfpc

CVSS Score

8.3

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

LOW

Affected Products

Vendor	Product	Versions
Zephyrproject	Zephyr	>= 2.4.0, < 2.5.0

Related Weaknesses (CWE)

CWE-191

References

http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-89j6-qpxf-pExploitPatchThird Party Advisory
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-89j6-qpxf-pExploitPatchThird Party Advisory

FAQ

What is CVE-2021-3323?

CVE-2021-3323 is a vulnerability with a CVSS score of 8.3 (HIGH). Integer Underflow in 6LoWPAN IPHC Header Uncompression in Zephyr. Zephyr versions >= >=2.4.0 contain Integer Underflow (Wrap or Wraparound) (CWE-191). For more information, see https://github.com/zeph...

How severe is CVE-2021-3323?

CVE-2021-3323 has been rated HIGH with a CVSS base score of 8.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-3323?

Check the references section above for vendor advisories and patch information. Affected products include: Zephyrproject Zephyr.