Multiple vulnerabilities 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 vulnerabilities are due to incorrect processing of BGP update messages that contain crafted EVPN attributes. An attacker could exploit these vulnerabilities by sending BGP EVPN update messages with malformed attributes to be processed by an affected system. A successful exploit could allow the attacker to 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 these vulnerabilities, 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.
Metrics
No CVSS v4.0
Attack Vector Network
Attack Complexity Low
Privileges Required None
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact High
User Interaction None
Attack Vector Network
Attack Complexity Low
Privileges Required None
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact High
User Interaction None
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
Key SSVC decision points have not yet been added.
Affected Vendors & Products
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Cisco |
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Configuration 1 [-]
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Configuration 2 [-]
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Configuration 3 [-]
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Configuration 4 [-]
AND |
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No data.
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: cisco
Published: 2020-01-26T04:31:03.023685Z
Updated: 2024-09-16T19:46:07.742Z
Reserved: 2019-09-06T00:00:00
Link: CVE-2019-16022
Vulnrichment
No data.
NVD
Status : Analyzed
Published: 2020-01-26T05:15:16.193
Modified: 2020-01-29T18:23:44.177
Link: CVE-2019-16022
Redhat
No data.