Vulnerability Description
An issue was discovered in the /api/connector endpoint handler in Yubico yubihsm-connector before 3.0.1 (in YubiHSM SDK before 2021.04). The handler did not validate the length of the request, which can lead to a state where yubihsm-connector becomes stuck in a loop waiting for the YubiHSM to send it data, preventing any further operations until the yubihsm-connector is restarted. An attacker can send 0, 1, or 2 bytes to trigger this.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Yubico | Yubihsm Connector | < 3.0.1 |
| Fedoraproject | Fedora | 34 |
Related Weaknesses (CWE)
References
- https://github.com/Yubico/yubihsm-connector/releasesThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://www.yubico.com/support/security-advisories/ysa-2021-02/Vendor Advisory
- https://github.com/Yubico/yubihsm-connector/releasesThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://www.yubico.com/support/security-advisories/ysa-2021-02/Vendor Advisory
FAQ
What is CVE-2021-28484?
CVE-2021-28484 is a vulnerability with a CVSS score of 7.5 (HIGH). An issue was discovered in the /api/connector endpoint handler in Yubico yubihsm-connector before 3.0.1 (in YubiHSM SDK before 2021.04). The handler did not validate the length of the request, which c...
How severe is CVE-2021-28484?
CVE-2021-28484 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-2021-28484?
Check the references section above for vendor advisories and patch information. Affected products include: Yubico Yubihsm Connector, Fedoraproject Fedora.