CVE-2020-3569 Cisco IOS XR Software DVMRP Memory Exhaustion
Remote attackers can crash the IGMP process or exhaust memory on Cisco IOS XR devices by sending crafted IGMP traffic, impacting routing stability.
- Exploited in the wild
- Since 3 Nov 2021
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-3569?
CVE-2020-3569 is a high-severity denial of service vulnerability in Cisco Ios Xr, published on 23 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2020-3569?
It affects 1 product.
Products include Cisco Ios Xr.
How do I fix CVE-2020-3569?
No fix has been published for CVE-2020-3569 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 May 2022.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-3569 being exploited?
Yes. Attackers have exploited CVE-2020-3569 in the wild since at least 3 Nov 2021.
Other vulnerabilities in Cisco Ios Xr
- CVE-2020-3118 Cisco IOS XR Software Discovery Protocol Format String
- CVE-2020-3566 Cisco IOS XR Software DVMRP Memory Exhaustion
- CVE-2010-3035 Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service
- CVE-2022-20821 Cisco IOS XR Open Port
- CVE-2009-2055 Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service
Sources
Also known as GHSA-35gg-5cvh-w445.