CVE-2021-27217
Medium
Description
An issue was discovered in the _send_secure_msg() function of Yubico yubihsm-shell through 2.0.3. The function does not correctly validate the embedded length field of an authenticated message received from the device. Out-of-bounds reads performed by aes_remove_padding() can crash the running process, depending on the memory layout. This could be used by an attacker to cause a client-side denial of service. The yubihsm-shell project is included in the YubiHSM 2 SDK product.
SeverityMedium
CVSS4.4
Exploit probability—
ProductYubico Yubihsm-shell
PublishedMar 4, 2021
First seenMar 4, 2021
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| yubico yubihsm-shell | v ≤ 2.0.3 | — |
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