{"cve_id":"CVE-2017-12238","published":"2017-09-29T01:34:48.997000+00:00","last_modified":"2026-06-17T01:02:56.937000+00:00","vuln_status":"Analyzed","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_version":"3.1","cvss_vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","base_score":6.5,"base_severity":"MEDIUM","attack_vector":"ADJACENT_NETWORK","privileges_req":"NONE","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"NONE","impact_i":"NONE","impact_a":"HIGH","cwe_ids":["CWE-399"],"in_kev":true,"kev_date_added":"2022-03-03","kev_ransomware":false,"epss_score":0.02017,"epss_percentile":0.80921,"cap_rule_version":"0.1.1","stage":"IMPACT","req_access":"NONE","req_vector":"ADJACENT","req_user_interaction":false,"grant_access":"NONE","caps":["DOS"],"terminal":true,"cap_confidence":"high","ingested_at":"2026-09-18T08:38:56.699656+00:00","first_seen":"2017-09-29T01:34:48.997000+00:00","kev_first_seen":"2022-03-03T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["cisco"],"products":["c6800-16p10g","c6800-16p10g-xl","catalyst_6000","catalyst_6000_ws-svc-nam-1","catalyst_6000_ws-svc-nam-2","catalyst_6000_ws-x6380-nam","catalyst_6500","catalyst_6500-e","catalyst_6500_ws-svc-nam-1","catalyst_6500_ws-svc-nam-2","catalyst_6500_ws-x6380-nam","catalyst_6503-e","catalyst_6504-e","catalyst_6506-e","catalyst_6509-e","catalyst_6509-neb-a","catalyst_6509-v-e","catalyst_6513","catalyst_6513-e","ios"],"affected":[{"vendor":"cisco","product":"ios","ranges":["≥ 15.0 and ≤ 15.4"]}]}