Arbitrary Code Execution Vulnerability in Broadcom MediaxChange Firmware Affecting Cisco IP Phones
CVE-2021-33478

6.8MEDIUM

Key Information:

Vendor
Cisco
Status
Ip Phone 8800 Series With Multiplatform Firmware
Ip Phone 8861 With Multiplatform Firmware
Ip Phone 8811 With Multiplatform Firmware
Ip Phone 8841 With Multiplatform Firmware
Vendor
CVE Published:
22 July 2021

Summary

The TrustZone implementation in specific versions of the Broadcom MediaxChange firmware presents a significant security issue. An unauthenticated attacker, who gains physical access to the affected devices, may exploit this vulnerability to execute arbitrary code within the Trusted Execution Environment (TEE). This exploit necessitates the physical disassembly of the device, allowing manipulation of voltage and current on critical chip pins. Various Cisco IP Phone models are affected, compromising their security integrity.

References

https://tools.cisco.com/security/center/content/CiscoSecu...
x_refsource_MISC

CVSS V3.1

Score:
6.8
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Physical
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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