Cisco · Catalyst 6800 Series Switches
CVE-2017-12238
Cisco Catalyst 6800 Series Switches VPLS Denial-of-Service Vulnerability
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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.
CISA: A vulnerability in the Virtual Private LAN Service (VPLS) code of Cisco IOS for Cisco Catalyst 6800 Series Switches could allow an unauthenticated, adjacent attacker to cause a denial of service.
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Apply updates per vendor instructions.
ABD federal kurumları için son tarih: 24 Mart 2022
Cisco için istismar edilen diğer açıklar
| Eklenme | Açık | Ürün | Önem | Saldırı olasılığı |
|---|---|---|---|---|
| 14 Eki 2026 | Relative Path Traversal | Secure Email Gateway | Kritik 9,8 | 2,2% |
| 30 Eyl 2026 | Hex Encoding | Catalyst SD-WAN Manager | Kritik 9,8 | 39% |
| 16 Eyl 2026 | Incorrect Use of Privileged APIs | Identity Services Engine | Kritik 10,0 | 76% |
| 14 Eyl 2026 | SQL Injection | Secure Email Gateway | Kritik 9,8 | 30% |
| 9 Eyl 2026 | Firewall Management Center Authentication Bypass Using an Alternate Path or Channel | Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management | Kritik 10,0 | 88% |
| 11 Ağu 2026 | Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection | Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) | Yüksek 8,6 | 1,0% |
| 29 Tem 2026 | Secure Firewall Management Center Use of Hard-coded Password | Secure Firewall Management Center (FMC) | Orta 5,3 | 35% |
| 13 Tem 2026 | Cross-Site Request Forgery | IOS | Yüksek 8,1 | 34% |
Kaynaklar: Known Exploited Vulnerabilities (CISA, kamu malı), CVE records (cve.org) ve EPSS (FIRST). Saldırı olasılığı, birinin önümüzdeki 30 günde açığı istismar etmeye çalışacağına dair EPSS tahminidir.