VulnerabilityModified
CVE-2020-10185
The sync endpoint in YubiKey Validation Server before 2.40 allows remote attackers to replay an OTP.
HIGH 8.6EPSS 1.45%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- EPSS
- 1.45% probability · 72th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-294
- Affected
- yubico/yubikey one time password validation server
- Source
- cve@mitre.org
References
- https://github.com/Yubico/yubikey-val/releases/tag/yubikey-val-2.40Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/03/msg00014.html
- https://www.yubico.com/support/security-advisories/ysa-2020-01/Exploit, Vendor Advisory
- https://github.com/Yubico/yubikey-val/releases/tag/yubikey-val-2.40Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/03/msg00014.html
- https://www.yubico.com/support/security-advisories/ysa-2020-01/Exploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.