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CVE-2021-32033

Status Candidate

Overview

Protectimus SLIM NFC 70 10.01 devices allow a Time Traveler attack in which attackers can predict TOTP passwords in certain situations. The time value used by the device can be set independently from the used seed value for generating time-based one-time passwords, without authentication. Thus, an attacker with short-time physical access to a device can set the internal real-time clock (RTC) to the future, generate one-time passwords, and reset the clock to the current time. This allows the generation of valid future time-based one-time passwords without having further access to the hardware token.

Related Files

Protectimus SLIM NFC Time Manipulation
Posted Jun 18, 2021
Authored by Matthias Deeg | Site syss.de

When analyzing the Protectimus SLIM TOTP hardware token, Matthias Deeg found out that the time used by the Protectimus SLIM TOTP hardware token can be set independently from the used seed value for generating time-based one-time passwords without requiring any authentication.

tags | advisory
advisories | CVE-2021-32033
SHA-256 | 18da959eb49ff3d5b8d29ab92f7247fff8490774b451cce50831a03dc291d6c0
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