Vulnerability in Protectimus Slim Nfc 70
CVE-2021-32033
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (43.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Protectimus Slim Nfc 70
- Protectimus Slim Nfc 70 Firmware — versions 10.01
Weakness classification (CWE)
References
- www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-007.txt (Exploit, Third Party Advisory)
- seclists.org/fulldisclosure/2021/Jun/39 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- packetstormsecurity.com/files/163223/Protectimus-SLIM-NFC-Time-Manipulation.html (Exploit, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-32033?
- CVE-2021-32033 is a medium-severity vulnerability in Protectimus Slim Nfc 70, classified under Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG). CVSS score: 4.6/10. Published 2021-06-16.
- How severe is CVE-2021-32033?
- Medium severity. CVSS v3 base score is 4.6 out of 10.