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.
References
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| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-routes | Vendor Advisory |
Configurations
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History
No history.
Information
Published : 2020-01-26 05:15
Updated : 2024-02-28 17:28
NVD link : CVE-2019-16018
Mitre link : CVE-2019-16018
CVE.ORG link : CVE-2019-16018
JSON object : View
Products Affected
cisco
- asr_9010
- ncs_5508
- ios_xr
- asr_9910
- asr_9000v
- ncs_5002
- asr_9001
- ncs_1002
- asr_9006
- ncs_540
- ncs_5502-se
- asr_9904
- ncs_560
- ncs_1001
- xrv_9000
- ncs_5501-se
- asr_9906
- ncs_1004
- ncs_5516
- ncs_5501
- crs
- asr_9922
- ncs_5001
- asr_9912
- asr_9901
- ncs_6000
- ncs_5502
- ncs_540l