CVE-2021-28484
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.
| Software | From | Fixed in |
|---|---|---|
| yubico / yubihsm_connector | - | 3.0.1 |
| fedoraproject / fedora | 34 | 34.x |
github.com/Yubico/yubihsm-connector
|
- | 3.0.1 |
- https://github.com/Yubico/yubihsm-connector/commit/82bdf202c53460bac9106cc9b4b34a0a16cae0ed
- https://github.com/Yubico/yubihsm-connector/releases
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B7Q2KGXSPQEEONAWMFZRVH2TXWX3QPCQ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B7Q2KGXSPQEEONAWMFZRVH2TXWX3QPCQ/
- https://www.yubico.com/support/security-advisories/ysa-2021-02/
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