An issue found in TCPreplay tcprewrite v.4.4.3 allows a remote attacker to cause a denial of service via the tcpedit_dlt_cleanup function at plugins/dlt_plugins.c.
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 |
|---|---|---|---|
| Tcpreplay | Broadcom | 4.4.3 (including) | 4.4.3 (including) |
| Tcpreplay | Ubuntu | bionic | * |
| Tcpreplay | Ubuntu | kinetic | * |
| Tcpreplay | Ubuntu | lunar | * |
| Tcpreplay | Ubuntu | mantic | * |
| Tcpreplay | Ubuntu | trusty | * |
| Tcpreplay | 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.