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. The vulnerability is due to insufficient queue management for Internet Group Management Protocol (IGMP) packets. An attacker could exploit this vulnerability by sending crafted IGMP traffic to an affected device. 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 will release software updates that address this vulnerability.
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Wed, 22 Oct 2025 00:15:00 +0000
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Tue, 21 Oct 2025 20:30:00 +0000
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Tue, 21 Oct 2025 19:30:00 +0000
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Fri, 08 Nov 2024 16:15:00 +0000
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Status: PUBLISHED
Assigner: cisco
Published: 2020-08-29T15:15:13.627Z
Updated: 2025-10-21T23:35:37.484Z
Reserved: 2019-12-12T00:00:00.000Z
Link: CVE-2020-3566
Updated: 2024-08-04T07:37:55.511Z
Status : Modified
Published: 2020-08-29T16:15:09.797
Modified: 2025-10-22T00:17:07.873
Link: CVE-2020-3566
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