What’s Vulnerable › Vulnerabilities

CVE-2020-13132

• Severity: medium (CVSS 4.6 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: yes
• Published: 2020-07-09 · updated 2026-06-17
• Weakness: CWE-763

Description

An issue was discovered in Yubico libykpiv before 2.1.0. An attacker can trigger an incorrect free() in the ykpiv_util_generate_key() function in lib/util.c through incorrect error handling code. This could be used to cause a denial of service attack.

Affected products

• Yubico Libykpiv: before 2.1.0 — fixed in 2.1.0
• Yubico Piv Tool Manager: before 2.0.0 — fixed in 2.0.0
• Yubico Yubikey Smart Card Minidriver: through 4.1.0.172

How to fix

Upgrade to a fixed version: Yubico Libykpiv 2.1.0; Yubico Piv Tool Manager 2.0.0. Check the vendor advisory for mitigations.

References

• https://blog.inhq.net/posts/yubico-libykpiv-vuln/
• https://www.yubico.com/support/security-advisories/ysa-2020-02/
• https://blog.inhq.net/posts/yubico-libykpiv-vuln/
• https://www.yubico.com/support/security-advisories/ysa-2020-02/

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