CVE-2020-13132

Name: CVE-2020-13132
Creator: NVD / NIST
Published: 2020-07-09T18:15:10.663+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.6/10EPSS 0.64%

Last modified Jun 17, 2026

CVE-2020-13132 is a medium-severity vulnerability rated 4.6/10 on the CVSS scale. 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. EPSS estimates a 0.64% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.6/10

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.64%

45.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-763

Affected Software

Vendor	Product	Versions
Yubico	Libykpiv	< 2.1.0
Yubico	Piv Tool Manager	< 2.0.0
Yubico	Yubikey Smart Card Minidriver	<= 4.1.0.172

References

https://blog.inhq.net/posts/yubico-libykpiv-vuln/Exploit, Third Party Advisory
https://www.yubico.com/support/security-advisories/ysa-2020-02/Vendor Advisory
https://blog.inhq.net/posts/yubico-libykpiv-vuln/Exploit, Third Party Advisory
https://www.yubico.com/support/security-advisories/ysa-2020-02/Vendor Advisory

Timeline

Published: Jul 9, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13132?

How severe is CVE-2020-13132?

CVE-2020-13132 has a CVSS score of 4.6/10 (MEDIUM severity). The EPSS model estimates a 0.64% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13132?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-13132?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST