CVE-2020-27486 Memory corruption in n/a
A buffer overflow in the ConnectIQ TVM allows malicious apps to escape the sandbox and execute arbitrary code on Garmin Forerunner devices.
- 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-2020-27486?
CVE-2020-27486 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: Buffer Overflow. 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 trusts the string length provided in the data section of the PRG file. It allocates memory for the string immediately, and then copies the string into the TVM object by using a function similar to strcpy. This copy can exceed the length of the allocated string data and overwrite heap data. A successful exploit would allow a ConnectIQ app store application to escape and perform activities outside the restricted application execution environment.
Weakness: CWE-120
Which versions are affected by CVE-2020-27486?
It affects 1 product.
Products include Garmin Forerunner 235 Firmware.
How do I fix CVE-2020-27486?
No fix has been published for CVE-2020-27486 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-2020-27486 being exploited?
There is no known exploitation of CVE-2020-27486 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-527v-pg89-4p69.