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    CVE-2021-33881

    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.

    Published:Jun 6, 2021
    Last Modified:Nov 21, 2024
    EPS:Jun 6, 2021
    EPSS Score:0.0006
    CVSS Score:4.2

    Affected Products

    Vendor
    Nxp
    Product
    Mifare Ultralight C
    Vendor
    Nxp
    Product
    Mifare Ultralight C Firmware
    Vendor
    Nxp
    Product
    Mifare Ultralight Ev1
    Vendor
    Nxp
    Product
    Mifare Ultralight Ev1 Firmware
    Vendor
    Nxp
    Product
    Mifare Ultralight Nano
    Vendor
    Nxp
    Product
    Mifare Ultralight Nano Firmware
    Vendor
    Nxp
    Product
    Ntag 210
    Vendor
    Nxp
    Product
    Ntag 210 Firmware
    Vendor
    Nxp
    Product
    Ntag 212
    Vendor
    Nxp
    Product
    Ntag 212 Firmware
    Vendor
    Nxp
    Product
    Ntag 213
    Vendor
    Nxp
    Product
    Ntag 213 Firmware
    Vendor
    Nxp
    Product
    Ntag 215
    Vendor
    Nxp
    Product
    Ntag 215 Firmware
    Vendor
    Nxp
    Product
    Ntag 216
    Vendor
    Nxp
    Product
    Ntag 216 Firmware

    Exploits

    https://www.sstic.org/2021/presentation/eeprom_it_will_all_end_in_tears/https://www.sstic.org/2021/presentation/eeprom_it_will_all_end_in_tears/

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High