CVE-2017-6657 is a high-severity vulnerability affecting Cisco Sourcefire Snort 3.0 before build 233, stemming from improper Ether Type Validation. Attackers can craft malicious packets with IP protocol numbers in the ether type field, confusing Snort++'s decoder array and leading to a denial-of-service (DoS) condition, such as a crash when processing specific packet types like eth:llc:snap:icmp6. The vulnerability has a CVSSv3 score of 7.5 (High) due to its network-based attack vector and low attack complexity, requiring no privileges or user interaction. There is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), and it shows no signs of active exploitation or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:cisco:snort\+\+:-:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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