High severity · published Mar 5, 2020
CVE-2020-10185
The sync endpoint in YubiKey Validation Server before 2.40 allows remote attackers to replay an OTP
8.6
CVSS
1.7%
EPSS
No
On KEV
Description
The sync endpoint in YubiKey Validation Server before 2.40 allows remote attackers to replay an OTP. NOTE: this issue is potentially relevant to persons outside Yubico who operate a self-hosted OTP validation service with a non-default configuration such as an open sync pool; the issue does NOT affect YubiCloud.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 77% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
YO
Yubikey One Time Password Validation Server · Yubico
before 2.40 · source: NVD
Affected product
YO
Yubikey One Time Password Validation Server
Yubico
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-10185
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-10185
Release Notes
https://github.com/Yubico/yubikey-val/releases/tag/yubikey-val-2.40
lists.debian.org
https://lists.debian.org/debian-lts-announce/2020/03/msg00014.html
Exploit
https://www.yubico.com/support/security-advisories/ysa-2020-01/
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