Unrated severityNVD Advisory· Published Jun 6, 2021· Updated Aug 4, 2024
CVE-2021-33881
CVE-2021-33881
Description
On NXP MIFARE Ultralight and NTAG cards, an attacker can interrupt a write operation (aka conduct a "tear off" attack) over RFID to bypass a Monotonic Counter protection mechanism. The impact depends on how the anti tear-off feature is used in specific applications such as public transportation, physical access control, etc.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- NXP/MIFARE Ultralight and NTAG cardsdescription
Patches
Vulnerability mechanics
References
4- blog.quarkslab.com/rfid-monotonic-counter-anti-tearing-defeated.htmlmitrex_refsource_MISC
- www.nxp.com/docs/en/application-note/AN11340.pdfmitrex_refsource_MISC
- www.nxp.com/docs/en/application-note/AN13089.pdfmitrex_refsource_MISC
- www.sstic.org/2021/presentation/eeprom_it_will_all_end_in_tears/mitrex_refsource_MISC
News mentions
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