Security News > 2020 > September > Attackers are exploiting two zero-day flaws in Cisco enterprise-grade routers
A technical support intervention has revealed two zero-day vulnerabilities in the OS running on Cisco enterprise-grade routers that attackers are trying to actively exploit.
Cisco plans to release software updates to plug these security holes, but in the meantime administrators are advised to implement one or all of the provided mitigations.
The two zero-day flaws - CVE-2020-3566 and CVE-2020-3569 - affect the Distance Vector Multicast Routing Protocol feature of Cisco IOS XR Software, running on Cisco enterprise-grade routers for service providers, data centers, enterprises, and critical infrastructure.
"A successful exploit could allow the attacker to cause memory exhaustion, resulting in instability of other processes. These processes may include, but are not limited to, interior and exterior routing protocols," Cisco explained.
"These vulnerabilities affect any Cisco device that is running any release of Cisco IOS XR Software if an active interface is configured under multicast routing," they added.
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Related Vulnerability
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2020-09-23 | CVE-2020-3569 | Allocation of Resources Without Limits or Throttling vulnerability in Cisco IOS XR Multiple vulnerabilities in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to either immediately crash the Internet Group Management Protocol (IGMP) process or make it consume available memory and eventually crash. | 8.6 |
| 2020-08-29 | CVE-2020-3566 | Allocation of Resources Without Limits or Throttling vulnerability in Cisco IOS XR 6.4.2 A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory of an affected device. | 8.6 |