A vulnerability in the implementation of Border Gateway Protocol (BGP) Ethernet VPN (EVPN) functionality in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of a BGP update message that contains crafted EVPN attributes. An attacker could indirectly exploit the vulnerability by sending BGP EVPN update messages with a specific, malformed attribute to an affected system and waiting for a user on the device to display the EVPN operational routes’ status. If successful, the attacker could cause the BGP process to restart unexpectedly, resulting in a DoS condition. The Cisco implementation of BGP accepts incoming BGP traffic only from explicitly defined peers. To exploit this vulnerability, the malicious BGP update message would need to come from a configured, valid BGP peer, or would need to be injected by the attacker into the victim's BGP network on an existing, valid TCP connection to a BGP peer.
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Affected Vendors & Products
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History
Fri, 15 Nov 2024 18:15:00 +0000
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MITRE
Status: PUBLISHED
Assigner: cisco
Published: 2020-01-26T04:30:48.072294Z
Updated: 2024-11-15T17:46:42.156Z
Reserved: 2019-09-06T00:00:00
Link: CVE-2019-16018
Vulnrichment
Updated: 2024-08-05T01:03:32.796Z
NVD
Status : Modified
Published: 2020-01-26T05:15:14.413
Modified: 2024-11-21T04:29:56.110
Link: CVE-2019-16018
Redhat
No data.