National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-6657 Detail

Current 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.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 7.5 HIGH
Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://blog.snort.org/2017/05/snort-vulnerabilities-found.html Third Party Advisory
http://www.securitytracker.com/id/1038483
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170515-snort Vendor Advisory

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information NIST  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:cisco:snort\+\+:-:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

3 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-6657
NVD Published Date:
05/16/2017
NVD Last Modified:
10/02/2019