Vulnerability Description
A Denial of Service vulnerability exists in mbed TLS 3.0.0 and earlier in the mbedtls_pkcs12_derivation function when an input password's length is 0.
CVSS Score
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Arm | Mbed Tls | <= 3.0.0 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- https://github.com/ARMmbed/mbedtls/issues/5136ExploitIssue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlMailing ListThird Party Advisory
- https://github.com/ARMmbed/mbedtls/issues/5136ExploitIssue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/06/msg00034.html
FAQ
What is CVE-2021-43666?
CVE-2021-43666 is a vulnerability with a CVSS score of 7.5 (HIGH). A Denial of Service vulnerability exists in mbed TLS 3.0.0 and earlier in the mbedtls_pkcs12_derivation function when an input password's length is 0.
How severe is CVE-2021-43666?
CVE-2021-43666 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-43666?
Check the references section above for vendor advisories and patch information. Affected products include: Arm Mbed Tls, Debian Debian Linux.