CVE-2021-33478 Memory corruption in n/a
An attacker with physical access can achieve arbitrary code execution in the TrustZone TEE of affected Cisco IP phones by manipulating chip pins.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-33478?
CVE-2021-33478 is a medium-severity memory corruption vulnerability in n/a, published on 22 Jul 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-119
Which versions are affected by CVE-2021-33478?
It affects 15 products.
Products include Cisco Ip Phone 8800 Firmware, Cisco Ip Phone 8800 Series With Multiplatform Firmware, Cisco Ip Phone 8811 Firmware, Cisco Ip Phone 8811 With Multiplatform Firmware, Cisco Ip Phone 8841 Firmware, Cisco Ip Phone 8841 With Multiplatform Firmware and 9 more.
How do I fix CVE-2021-33478?
No fix has been published for CVE-2021-33478 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-33478 being exploited?
There is no known exploitation of CVE-2021-33478 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-vh28-q6j2-63w7.