Product:
Snort 3
Summary
Multiple Cisco products are affected by a vulnerability in the Snort 3 HTTP Decoder that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This vulnerability is due to a lack of complete error checking when the MIME fields of the HTTP header are parsed. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts.
Details
| Severity | Base Score | CVE |
|---|---|---|
| MEDIUM | 5.8 | CVE-2025-20360 |
Exploitation
An attacker could exploit this vulnerability by sending crafted HTTP packets through an established connection to be parsed by Snort 3. By manipulating the MIME fields in the HTTP header, the attacker can trigger the Snort 3 Detection Engine to restart, leading to a denial of service condition.
Affected Products
- Snort 3 Detection Engine: Vulnerable to DoS attacks due to improper error checking in HTTP header parsing.
Mitigation
To mitigate this vulnerability, users should ensure they are running the latest version of Snort 3 and apply any available patches. Additionally, monitoring network traffic for unusual patterns may help detect potential exploitation attempts.