CVE-2020-3569
Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability
Exploited in the wild
This vulnerability is on a Known Exploited Vulnerabilities catalogue, added 2021-11-03. Federal due date: 2022-05-03.
Apply updates per vendor instructions.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Cisco | Ios Xr | Versions 6.1.4, 6.2.3, 6.3.3, 6.4.2, 6.5.3, 6.6.2 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dvmrp-memexh-dSmpdvfz
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3569