Multiple vulnerabilities in Yubico PIV Tool and YubiKey Smart Card Minidrive
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-13131 CVE-2020-13132 |
| CWE-ID | CWE-125 CWE-119 |
| Exploitation vector | Local |
| Public exploit |
Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available. |
| Vulnerable software Subscribe |
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 |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Out-of-bounds read
EUVDB-ID: #VU29615
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 - Out-of-bounds read
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionslibykpiv: 2.0.0
Yubico PIV Tool: 0.0.1 - 2.0.0
YubiKey Smart Card Minidriver: 4.1.0.172
External linkshttp://www.yubico.com/support/security-advisories/ysa-2020-02
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.
2) Buffer overflow
EUVDB-ID: #VU29616
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 - Memory corruption
Exploit availability: No
DescriptionThe 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.
Install updates from vendor's website.
Vulnerable software versionslibykpiv: 2.0.0
Yubico PIV Tool: 0.0.1 - 2.0.0
YubiKey Smart Card Minidriver: 4.1.0.172
External linkshttp://www.yubico.com/support/security-advisories/ysa-2020-02
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.
