CVE-2021-33478
CVSS V2 Medium 4.6
CVSS V3 Medium 6.8
Description
The TrustZone implementation in certain Broadcom MediaxChange firmware could allow an unauthenticated, physically proximate attacker to achieve arbitrary code execution in the TrustZone Trusted Execution Environment (TEE) of an affected device. This, for example, affects certain Cisco IP Phone and Wireless IP Phone products before 2021-07-07. Exploitation is possible only when the attacker can disassemble the device in order to control the voltage/current for chip pins.
Overview
- CVE ID
- CVE-2021-33478
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2021-07-22T17:15:09
- Last Modified Date
- 2021-08-02T15:38:07
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:cisco:ip_phone_8800_firmware:*:*:*:*:*:*:*:* | 1 | OR | 14.0\(1\) | |
| cpe:2.3:o:cisco:ip_phone_8800_series_with_multiplatform_firmware:*:*:*:*:*:*:*:* | 1 | OR | 11.3\(4\) | |
| cpe:2.3:o:cisco:ip_phone_8811_firmware:*:*:*:*:*:*:*:* | 1 | OR | 14.0\(1\) | |
| cpe:2.3:o:cisco:ip_phone_8811_with_multiplatform_firmware:*:*:*:*:*:*:*:* | 1 | OR | 11.3\(4\) | |
| cpe:2.3:o:cisco:ip_phone_8841_firmware:*:*:*:*:*:*:*:* | 1 | OR | 14.0\(1\) | |
| cpe:2.3:o:cisco:ip_phone_8841_with_multiplatform_firmware:*:*:*:*:*:*:*:* | 1 | OR | 11.3\(4\) | |
| cpe:2.3:o:cisco:ip_phone_8845_firmware:*:*:*:*:*:*:*:* | 1 | OR | 14.0\(1\) | |
| cpe:2.3:o:cisco:ip_phone_8845_with_multiplatform_firmware:*:*:*:*:*:*:*:* | 1 | OR | 11.3\(4\) | |
| cpe:2.3:o:cisco:ip_phone_8851_firmware:*:*:*:*:*:*:*:* | 1 | OR | 14.0\(1\) | |
| cpe:2.3:o:cisco:ip_phone_8851_with_multiplatform_firmware:*:*:*:*:*:*:*:* | 1 | OR | 11.3\(4\) | |
| cpe:2.3:o:cisco:ip_phone_8861_firmware:*:*:*:*:*:*:*:* | 1 | OR | 14.0\(1\) | |
| cpe:2.3:o:cisco:ip_phone_8861_with_multiplatform_firmware:*:*:*:*:*:*:*:* | 1 | OR | 11.3\(4\) | |
| cpe:2.3:o:cisco:ip_phone_8865_firmware:*:*:*:*:*:*:*:* | 1 | OR | 14.0\(1\) | |
| cpe:2.3:o:cisco:ip_phone_8865_with_multiplatform_firmware:*:*:*:*:*:*:*:* | 1 | OR | 11.3\(4\) | |
| cpe:2.3:o:cisco:wireless_ip_phone_8821_firmware:*:*:*:*:*:*:*:* | 1 | OR | 11.0\(6\)sr1 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:P/A:P
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 4.6
- Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- PHYSICAL
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 6.8
- Base Severity
- MEDIUM
- Exploitability Score
- 0.9
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-brcm-mxc-jul2021-26LqUZUh | Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-33478 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33478 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:58:47 | Added to TrackCVE | |||
| 2022-12-05 06:48:28 | 2021-07-22T17:15Z | 2021-07-22T17:15:09 | CVE Published Date | updated |
| 2022-12-05 06:48:28 | 2021-08-02T15:38:07 | CVE Modified Date | updated | |
| 2022-12-05 06:48:28 | Analyzed | Vulnerability Status | updated |