CVE-2017-6657
Cisco Sourcefire Snort Ether Type Validation Bypass
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.
INFO
Published Date :
May 16, 2017, 5:29 p.m.
Last Modified :
Oct. 3, 2019, 12:03 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2017-6657.
| URL | 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2017-6657 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2017-6657 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CWE Remap by [email protected]
Oct. 03, 2019
Action Type Old Value New Value Changed CWE CWE-399 NVD-CWE-noinfo -
CVE Modified by [email protected]
Jul. 08, 2017
Action Type Old Value New Value Added Reference http://www.securitytracker.com/id/1038483 [No Types Assigned] -
Initial Analysis by [email protected]
May. 24, 2017
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type http://blog.snort.org/2017/05/snort-vulnerabilities-found.html No Types Assigned http://blog.snort.org/2017/05/snort-vulnerabilities-found.html Third Party Advisory Added Reference https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170515-snort [Vendor Advisory] Added CWE CWE-399 Added CPE Configuration OR *cpe:2.3:a:cisco:snort\+\+:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2017-6657 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2017-6657
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.12 }} 0.00%
score
0.44175
percentile