Medium severity · published Jul 9, 2020
CVE-2020-15000
A PIN management problem was discovered on Yubico YubiKey 5 devices 5.2.0 to 5.2.6
5.9
CVSS
0.7%
EPSS
No
On KEV
Description
A PIN management problem was discovered on Yubico YubiKey 5 devices 5.2.0 to 5.2.6. OpenPGP has three passwords: Admin PIN, Reset Code, and User PIN. The Reset Code is used to reset the User PIN, but it is disabled by default. A flaw in the implementation of OpenPGP sets the Reset Code to a known value upon initialization. If the retry counter for the Reset Code is set to non-zero without changing the Reset Code, this known value can be used to reset the User PIN. To set the retry counters, the Admin PIN is required.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
Y5
Yubikey 5 Nfc Firmware · Yubico
5.2.0 through 5.2.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15000
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-15000
Mitigation
https://www.yubico.com/support/security-advisories/ysa-2020-05/
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