CVE-2021-33881

CVSS V2 Low 1.9 CVSS V3 Medium 4.2
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.
Overview
  • CVE ID
  • CVE-2021-33881
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-06-06T16:15:07
  • Last Modified Date
  • 2021-06-17T16:39:54
Weakness Enumerations
CWE URL
CWE-863 http://cwe.mitre.org/data/definitions/863.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:nxp:mifare_ultralight_ev1_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:nxp:mifare_ultralight_ev1:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:nxp:mifare_ultralight_c_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:nxp:mifare_ultralight_c:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:nxp:mifare_ultralight_nano_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:nxp:mifare_ultralight_nano:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:nxp:ntag_210_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:nxp:ntag_210:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:nxp:ntag_212_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:nxp:ntag_212:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:nxp:ntag_213_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:nxp:ntag_213:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:nxp:ntag_215_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:nxp:ntag_215:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:nxp:ntag_216_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:nxp:ntag_216:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:M/Au:N/C:N/I:P/A:N
  • Access Vector
  • LOCAL
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 1.9
  • Severity
  • LOW
  • Exploitability Score
  • 3.4
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
  • Attack Vector
  • PHYSICAL
  • Attack Compatibility
  • HIGH
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 4.2
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 0.5
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://www.nxp.com/docs/en/application-note/AN13089.pdf Vendor Advisory
https://www.sstic.org/2021/presentation/eeprom_it_will_all_end_in_tears/ Exploit Third Party Advisory
https://www.nxp.com/docs/en/application-note/AN11340.pdf Vendor Advisory
https://blog.quarkslab.com/rfid-monotonic-counter-anti-tearing-defeated.html Mitigation Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-33881
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33881
History
Created Old Value New Value Data Type Notes
2022-05-10 07:10:58 Added to TrackCVE
2022-12-05 03:37:14 2021-06-06T16:15Z 2021-06-06T16:15:07 CVE Published Date updated
2022-12-05 03:37:14 2021-06-17T16:39:54 CVE Modified Date updated
2022-12-05 03:37:14 Analyzed Vulnerability Status updated