PT-2017-12403 · Cisco · Cisco Ios Xe

Published 2017-09-06 · Updated 2019-10-09 · CVE-2017-12213

Positive Technologies (AI Summary)

CVSS v2.0

3.3

Low

Base vector

AV:A/AC:L/Au:N/C:N/I:P/A:N

Name of the Vulnerable Software and Affected Versions Cisco IOS XE Software running on Cisco Catalyst 4000 Series Switches (affected versions not specified)

Description A vulnerability in the dynamic access control list (ACL) feature could allow an unauthenticated, adjacent attacker to cause dynamic ACL assignment to fail and the port to fail open. This could allow the attacker to pass traffic to the default VLAN of the affected port. The issue is due to an uncaught error condition that may occur during the reassignment of the auth-default-ACL dynamic ACL to a switch port after 802.1x authentication fails. A successful exploit could allow a physically adjacent attacker to bypass 802.1x authentication and cause the affected port to fail open, allowing the attacker to pass traffic to the default VLAN of the affected switch port.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

CVE-2017-12213

Affected Products

Cisco Ios Xe

References · 5

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-cat · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-cat · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-12213 · Security Note
• http://securitytracker.com/id/1039284 · Note
• http://securityfocus.com/bid/100663 · Note