Vulnerability identifier: #VU29616

Vulnerability risk: Low

CVSSv3.1: 5 [CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-13132

CWE-ID: CWE-119

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 perform a denial of service (DoS) attack.

The vulnerability exists due to the passed in pointer is deallocated instead of the dynamically allocated one inside the "ykpiv_util_generate_key()" function. A local attacker can use a specially crafted token, trigger memory corruption and cause a denial of service condition on the target 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. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

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.