Low
CVE-2020-3569 - Denial of service vulnerability in Cisco IOS XR
CVE-2020-3569 - Denial of service vulnerability in Cisco IOS XR
Description
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. The memory consumption may negatively impact other processes that are running on the device. These vulnerabilities are due to the incorrect handling of IGMP packets. An attacker could exploit these vulnerabilities by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to immediately crash the IGMP process or cause memory exhaustion, resulting in other processes becoming unstable. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address these vulnerabilities.
Add Assessment
Technical Analysis
Same initial evaluation as CVE-2020-3566—namely that successful exploitation doesn’t appear thus far to yield useful access for attackers, though disruption to critical business services is still a major concern for service providers. If the DoS enables a new threat vector, attacker value on these vulns rises. I’m going to leave exploitability blank for the time being. Rapid7 has analysis here.
CVSS V3 Severity and Metrics
General Information
Vendors
- cisco
Products
- ios xr,
- ios xr 6.1.4,
- ios xr 6.2.3,
- ios xr 6.3.3,
- ios xr 6.4.2,
- ios xr 6.4.3,
- ios xr 6.5.3,
- ios xr 6.6.2,
- ios xr 6.6.3,
- ios xr 7.0.2,
- ios xr 7.1.15,
- ios xr 7.1.2
