CVE-2017-12238
CVE-2017-12238
In short
A flaw in Cisco Catalyst 6800 switches allows an attacker on the same network to crash a specific line card by flooding it with fake MAC addresses, temporarily disabling network traffic through that card.
Technical detail
A memory management vulnerability in VPLS code affects Cisco IOS 15.0-15.4 on Catalyst 6800 Series with C6800-16P10G/XL line cards. An adjacent attacker can exploit this by creating excessive VPLS-generated MAC entries, causing the line card to crash and trigger denial of service. Requires VPLS configuration with the affected line card as core-facing MPLS interface.
Summary generated and translated by AI from the official description.
A vulnerability in the Virtual Private LAN Service (VPLS) code of Cisco IOS 15.0 through 15.4 for Cisco Catalyst 6800 Series Switches could allow an unauthenticated, adjacent attacker to cause a C6800-16P10G or C6800-16P10G-XL type line card to crash, resulting in a denial of service (DoS) condition. The vulnerability is due to a memory management issue in the affected software. An attacker could exploit this vulnerability by creating a large number of VPLS-generated MAC entries in the MAC address table of an affected device. A successful exploit could allow the attacker to cause a C6800-16P10G or C6800-16P10G-XL type line card to crash, resulting in a DoS condition. 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. Cisco Bug IDs: CSCva61927.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
n/a · Cisco IOSWant to know if your infrastructure is exposed to this?
Talk to TrueHacking →