What’s Vulnerable › Vulnerabilities

CVE-2023-39908

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-08-14 · updated 2026-06-17
• Weakness: CWE-125

Description

The PKCS11 module of the YubiHSM 2 SDK through 2023.01 does not properly validate the length of specific read operations on object metadata. This may lead to disclosure of uninitialized and previously used memory.

Affected products

• Yubico Yubihsm 2 Sdk: before 2023.08 — fixed in 2023.08

How to fix

Upgrade to a fixed version: Yubico Yubihsm 2 Sdk 2023.08. Check the vendor advisory for mitigations.

References

• https://blog.inhq.net/posts/yubico-yubihsm-pkcs-vuln/
• https://www.yubico.com/support/security-advisories/ysa-2023-01/
• https://blog.inhq.net/posts/yubico-yubihsm-pkcs-vuln/
• https://www.yubico.com/support/security-advisories/ysa-2023-01/

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