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[email protected]CVE-2021-33478

HistoryJul 22, 2021 - 5:15 p.m.

CVE-2021-33478

2021-07-2217:15:09

CWE-119

[email protected]

web.nvd.nist.gov

cve-2021-33478

trustzone

broadcom

mediaxchange

firmware

vulnerability

cisco

ip phone

wireless ip phone

nvd

4.6 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:P/I:P/A:P

6.8 Medium

CVSS3

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

36.4%

JSON

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.

Affected configurations

NVD

Node

ciscoip_phone_8800_firmwareRange<14.0\(1\)

ciscoip_phone_8800_series_with_multiplatform_firmwareRange<11.3\(4\)

ciscoip_phone_8811_firmwareRange<14.0\(1\)

ciscoip_phone_8811_with_multiplatform_firmwareRange<11.3\(4\)

ciscoip_phone_8841_firmwareRange<14.0\(1\)

ciscoip_phone_8841_with_multiplatform_firmwareRange<11.3\(4\)

ciscoip_phone_8845_firmwareRange<14.0\(1\)

ciscoip_phone_8845_with_multiplatform_firmwareRange<11.3\(4\)

ciscoip_phone_8851_firmwareRange<14.0\(1\)

ciscoip_phone_8851_with_multiplatform_firmwareRange<11.3\(4\)

ciscoip_phone_8861_firmwareRange<14.0\(1\)

ciscoip_phone_8861_with_multiplatform_firmwareRange<11.3\(4\)

ciscoip_phone_8865_firmwareRange<14.0\(1\)

ciscoip_phone_8865_with_multiplatform_firmwareRange<11.3\(4\)

ciscowireless_ip_phone_8821_firmwareRange<11.0\(6\)sr1

CPENameOperatorVersion
cisco:ip_phone_8800_firmwarecisco ip phone 8800 firmwarelt14.0\(1\)
cisco:ip_phone_8800_series_with_multiplatform_firmwarecisco ip phone 8800 series with multiplatform firmwarelt11.3\(4\)
cisco:ip_phone_8811_firmwarecisco ip phone 8811 firmwarelt14.0\(1\)
cisco:ip_phone_8811_with_multiplatform_firmwarecisco ip phone 8811 with multiplatform firmwarelt11.3\(4\)
cisco:ip_phone_8841_firmwarecisco ip phone 8841 firmwarelt14.0\(1\)
cisco:ip_phone_8841_with_multiplatform_firmwarecisco ip phone 8841 with multiplatform firmwarelt11.3\(4\)
cisco:ip_phone_8845_firmwarecisco ip phone 8845 firmwarelt14.0\(1\)
cisco:ip_phone_8845_with_multiplatform_firmwarecisco ip phone 8845 with multiplatform firmwarelt11.3\(4\)
cisco:ip_phone_8851_firmwarecisco ip phone 8851 firmwarelt14.0\(1\)
cisco:ip_phone_8851_with_multiplatform_firmwarecisco ip phone 8851 with multiplatform firmwarelt11.3\(4\)

CPE	Name	Operator	Version
cisco:ip_phone_8800_firmware	cisco ip phone 8800 firmware	lt	14.0\(1\)
cisco:ip_phone_8800_series_with_multiplatform_firmware	cisco ip phone 8800 series with multiplatform firmware	lt	11.3\(4\)
cisco:ip_phone_8811_firmware	cisco ip phone 8811 firmware	lt	14.0\(1\)
cisco:ip_phone_8811_with_multiplatform_firmware	cisco ip phone 8811 with multiplatform firmware	lt	11.3\(4\)
cisco:ip_phone_8841_firmware	cisco ip phone 8841 firmware	lt	14.0\(1\)
cisco:ip_phone_8841_with_multiplatform_firmware	cisco ip phone 8841 with multiplatform firmware	lt	11.3\(4\)
cisco:ip_phone_8845_firmware	cisco ip phone 8845 firmware	lt	14.0\(1\)
cisco:ip_phone_8845_with_multiplatform_firmware	cisco ip phone 8845 with multiplatform firmware	lt	11.3\(4\)
cisco:ip_phone_8851_firmware	cisco ip phone 8851 firmware	lt	14.0\(1\)
cisco:ip_phone_8851_with_multiplatform_firmware	cisco ip phone 8851 with multiplatform firmware	lt	11.3\(4\)

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References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-brcm-mxc-jul2021-26LqUZUh

Social References

4.6 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:P/I:P/A:P

6.8 Medium

CVSS3

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

36.4%

JSON

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