A vulnerability was found in Avahi. A reachable assertion exists in the avahi_escape_label() function.
The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Avahi | Avahi | * | 0.9 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | avahi-0:0.7-21.el8_9.1 | * |
| Red Hat Enterprise Linux 8 | RedHat | avahi-0:0.7-21.el8_9.1 | * |
| Red Hat Enterprise Linux 8.6 Extended Update Support | RedHat | avahi-0:0.7-20.el8_6.3 | * |
| Red Hat Enterprise Linux 8.8 Extended Update Support | RedHat | avahi-0:0.7-20.el8_8.4 | * |
| Red Hat Enterprise Linux 9 | RedHat | avahi-0:0.8-20.el9 | * |
| Red Hat Enterprise Linux 9 | RedHat | avahi-0:0.8-20.el9 | * |
| Avahi | Ubuntu | bionic | * |
| Avahi | Ubuntu | devel | * |
| Avahi | Ubuntu | esm-infra/bionic | * |
| Avahi | Ubuntu | esm-infra/xenial | * |
| Avahi | Ubuntu | focal | * |
| Avahi | Ubuntu | jammy | * |
| Avahi | Ubuntu | kinetic | * |
| Avahi | Ubuntu | lunar | * |
| Avahi | Ubuntu | mantic | * |
| Avahi | Ubuntu | trusty | * |
| Avahi | Ubuntu | trusty/esm | * |
| Avahi | Ubuntu | xenial | * |
While assertion is good for catching logic errors and reducing the chances of reaching more serious vulnerability conditions, it can still lead to a denial of service. For example, if a server handles multiple simultaneous connections, and an assert() occurs in one single connection that causes all other connections to be dropped, this is a reachable assertion that leads to a denial of service.