NVD
- Id
- 85975
- Name
- CVE-2017-6657
- Description
- Cisco Sourcefire Snort 3.0 before build 233 mishandles Ether Type Validation. Since valid ether type and IP protocol numbers do not overlap, Snort++ stores all protocol decoders in a single array. That makes it possible to craft packets that have IP protocol numbers in the ether type field which will confuse the Snort++ decoder. For example, an eth:llc:snap:icmp6 packet will cause a crash because there is no ip6 header with which to calculate the icmp6 checksum. Affected decoders include gre, llc, trans_bridge, ciscometadata, linux_sll, and token_ring. The fix adds a check in the packet manager to validate the ether type before indexing the decoder array. An out of range ether type will raise 116:473.
- Reject
- CVSS Version
- 2
- CVSS Score
- 5
- Severity
- Medium
- CVSS Base Score
- 5
- CVSS Impact Subscore
- 2.9
- CVSS Exploit Subscore
- 10
- CVSS Vector
- (AV:N/AC:L/Au:N/C:N/I:N/A:P)
- Pub Date
- 2017-07-18
- Published
- 2017-05-16
- Modified Date
- 2017-07-07
- Seq
- 2017-6657
