Security News > 2020 > September > Cisco Issues Patches For 2 High-Severity IOS XR Flaws Under Active Attacks
Cisco yesterday released security patches for two high-severity vulnerabilities affecting its IOS XR software that were found exploited in the wild a month ago.
Tracked as CVE-2020-3566 and CVE-2020-3569, details for both zero-day unauthenticated DoS vulnerabilities were made public by Cisco late last month when the company found hackers actively exploiting Cisco IOS XR Software that is installed on a range of Cisco's carrier-grade and data center routers.
"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 and it is receiving DVMRP traffic," Cisco said in an advisory.
The vulnerabilities affect all Cisco devices running any release of Cisco IOS XR Software if an active interface is configured under multicast routing, and it is receiving DVMRP traffic.
Cisco customers are highly recommended to make sure they are running the latest Cisco IOS XR Software release earlier than 6.6.3 and Cisco IOS XR Software release 6.6.3 and later.
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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 |