CVE-2023-23306 Memory corruption in n/a

Critical 9.8 Published 23 May 2023 Updated 31 Jan 2025

A malicious application can exploit a type confusion flaw in the Ant BurstPayload API to overwrite memory and execute arbitrary code on the device.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-23306?

CVE-2023-23306 is a critical memory corruption vulnerability in n/a, published on 23 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The `Toybox.Ant.BurstPayload.add` API method in CIQ API version 2.2.0 through 4.1.7 suffers from a type confusion vulnreability, which can result in an out-of-bounds write operation. A malicious application could create a specially crafted `Toybox.Ant.BurstPayload` object, call its `add` method, override arbitrary memory and hijack the execution of the device's firmware.

Weakness: CWE-787

Which versions are affected by CVE-2023-23306?

It affects 1 product.

Products include Garmin Connect-Iq.

How do I fix CVE-2023-23306?

No fix has been published for CVE-2023-23306 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-2023-23306 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-23306 exists.

Sources

Also known as GHSA-r7vh-g6cm-2j84.