PT-2020-11961 · Yubico · Yubikey Validation Server

Published 2020-03-05 · Updated 2020-03-13 · CVE-2020-10185

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Name of the Vulnerable Software and Affected Versions YubiKey Validation Server versions prior to 2.40

Description The issue allows remote attackers to replay an OTP via the sync endpoint. This is potentially relevant to operators of self-hosted OTP validation services with non-default configurations, such as an open sync pool. However, it does not affect YubiCloud.

Recommendations For versions prior to 2.40, update to version 2.40 or later to resolve the issue. As a temporary workaround, consider restricting access to the sync endpoint to minimize the risk of exploitation.

Exploit

Fix

Weakness Enumeration

CWE-294

Related Identifiers

CVE-2020-10185

DLA-2141-1

Affected Products

Yubikey Validation Server

References · 10

• 🔥 https://yubico.com/support/security-advisories/ysa-2020-01 · Exploit
• https://cve.org/CVERecord?id=CVE-2020-10185 · Security Note
• https://ubuntu.com/security/CVE-2020-10185 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-10185 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-10185 · Security Note
• https://osv.dev/vulnerability/DLA-2141-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-10185 · Vendor Advisory
• https://github.com/Yubico/yubikey-val/commit/d0e4db3245deb5ce0c8d7d26069c78071a140286 · Note
• https://github.com/Yubico/yubikey-val/releases/tag/yubikey-val-2.40 · Note
• https://lists.debian.org/debian-lts-announce/2020/03/msg00014.html · Note