Vulnerability identifier: #VU29615

Vulnerability risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-13131

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
libykpiv
Web applications / JS libraries
Yubico PIV Tool
Universal components / Libraries / Libraries used by multiple products
YubiKey Smart Card Minidriver
Hardware solutions / Drivers

Vendor: Yubico

Description

The vulnerability allows a local attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in the "ykpiv_util_generate_key()" function. An attacker with physical access can use a specially crafted PIV token, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libykpiv: 2.0.0

Yubico PIV Tool: 0.0.1 - 2.0.0

YubiKey Smart Card Minidriver: 4.1.0.172

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External links
http://www.yubico.com/support/security-advisories/ysa-2020-02

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Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.