A time-of-check-time-of-use (TOCTOU) race condition vulnerability was found in networkd-dispatcher. This flaw exists because there is a certain time between the scripts being discovered and them being run. An attacker can abuse this vulnerability to replace scripts that networkd-dispatcher believes to be owned by root with ones that are not.
The product checks the state of a resource before using that resource, but the resource’s state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Windows_defender_for_endpoint | Microsoft | - (including) | - (including) |
| Networkd-dispatcher | Ubuntu | bionic | * |
| Networkd-dispatcher | Ubuntu | focal | * |
| Networkd-dispatcher | Ubuntu | impish | * |
| Networkd-dispatcher | Ubuntu | jammy | * |
| Networkd-dispatcher | Ubuntu | upstream | * |