CVE-2020-10185

HIGH EPSS 70.1%
Published Mar 5, 20206y ago · Modified Jun 17, 20262w ago
8.6 CVSS 3.1
High
Find Similar
Published Mar 5, 2020 6y ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
8.6
Exploitability
3.9
Impact
4.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability High

Threat Intelligence

EPSS Exploit Probability
70.1% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-294

Affected Products 1

VendorProductVersionRange
yubicoyubikey_one_time_password_validation_server* <2.40

References 3

  • github.com https://github.com/Yubico/yubikey-val/releases/tag/yubikey-val-2.40
    Release NotesThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2020/03/msg00014.html
  • yubico.com https://www.yubico.com/support/security-advisories/ysa-2020-01/
    ExploitVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.