Product:
Snort 3 Detection Engine
Summary
Multiple Cisco products are affected by a vulnerability in the processing of DCE/RPC requests that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to leak sensitive information or to restart, resulting in an interruption of packet inspection. This vulnerability is due to an error in buffer handling logic when processing DCE/RPC requests, which can result in a buffer out-of-bounds read.
Details
| Severity | Base Score | CVE |
|---|---|---|
| MEDIUM | 5.3 | CVE-2026-20027 |
Exploitation
An attacker could exploit this vulnerability by sending a large number of DCE/RPC requests through an established connection that is inspected by Snort 3. A successful exploit could allow the attacker to obtain sensitive information in the Snort 3 data stream.
Affected Products
- Snort 3 Detection Engine: Vulnerable to DCE/RPC request processing issues leading to potential information leakage.
Mitigation
To mitigate this vulnerability, it is recommended to apply any available patches from Cisco and to monitor network traffic for unusual DCE/RPC request patterns that may indicate an attempted exploit.