CVE-2020-27485 Memory corruption in n/a
A malicious ConnectIQ app can exploit an array index error to escape the sandbox and execute arbitrary code on the device.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-27485?
CVE-2020-27485 is a critical memory corruption vulnerability in n/a, published on 16 Nov 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Garmin Forerunner 235 before 8.20 is affected by: Array index error. The component is: ConnectIQ TVM. The attack vector is: To exploit the vulnerability, the attacker must upload a malicious ConnectIQ application to the ConnectIQ store. The ConnectIQ program interpreter fails to check the index provided when accessing the local variable in the LGETV and LPUTV instructions. This provides the ability to both read and write memory outside the bounds of the TVM context allocation. It can be leveraged to construct a use-after-free scenario, leading to a constrained read/write primitive across the entire MAX32630 address space. A successful exploit would allow a ConnectIQ app store application to escape and perform activities outside the restricted application execution environment.
Weakness: CWE-129
Which versions are affected by CVE-2020-27485?
It affects 1 product.
Products include Garmin Forerunner 235 Firmware.
How do I fix CVE-2020-27485?
No fix has been published for CVE-2020-27485 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-2020-27485 being exploited?
There is no known exploitation of CVE-2020-27485 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-q9qc-v68f-53f3.