SB2017092801 - Remote DoS in VPLS functionality in Cisco Catalyst 6800 Series Switches
Published: September 28, 2017
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Denial of service (CVE-ID: CVE-2017-12238)
CWE-ID: CWE-399 - Resource Management Errors
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a memory management issue when processing MAC entries. A remote attacker with access to local network can create a large number of VPLS-generated MAC entries in the MAC address table of an affected device and cause a C6800-16P10G or C6800-16P10G-XL type line card to crash.
Successful exploitation of the vulnerability may allow an attacker to perform a denial of service (DoS) attack against affected device.
This vulnerability affects Cisco Catalyst 6800 Series Switches that are running a vulnerable release of Cisco IOS Software and have a Cisco C6800-16P10G or C6800-16P10G-XL line card in use with Supervisor Engine 6T. To be vulnerable, the device must also be configured with VPLS and the C6800-16P10G or C6800-16P10G-XL line card needs to be the core-facing MPLS interfaces.
Remediation
Install update from vendor's website.