Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-33881

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
06/06/2021
Last modified:
17/06/2021

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.

Impact

Vector 3.x
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 4.20 MEDIUM
Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector (AV): Physical
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): High
Availability (A): None

Base Score 3.x
4.20
Severity 3.x
MEDIUM
Vector 2.0
AV:L/AC:M/Au:N/C:N/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 1.90 LOW
Vector: AV:L/AC:M/Au:N/C:N/I:P/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): None
Integrity (I): Physical
Availability (A): None

Base Score 2.0
1.90
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:nxp:mifare_ultralight_ev1_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:nxp:mifare_ultralight_ev1:-:*:*:*:*:*:*:*
cpe:2.3:o:nxp:mifare_ultralight_c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:nxp:mifare_ultralight_c:-:*:*:*:*:*:*:*
cpe:2.3:o:nxp:mifare_ultralight_nano_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:nxp:mifare_ultralight_nano:-:*:*:*:*:*:*:*
cpe:2.3:o:nxp:ntag_210_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:nxp:ntag_210:-:*:*:*:*:*:*:*
cpe:2.3:o:nxp:ntag_212_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:nxp:ntag_212:-:*:*:*:*:*:*:*
cpe:2.3:o:nxp:ntag_213_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:nxp:ntag_213:-:*:*:*:*:*:*:*
cpe:2.3:o:nxp:ntag_215_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:nxp:ntag_215:-:*:*:*:*:*:*:*
cpe:2.3:o:nxp:ntag_216_firmware:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools