A vulnerability in the Border Gateway Protocol (BGP) over an Ethernet Virtual Private Network (EVPN) for Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload, resulting in a denial of service (DoS) condition, or potentially corrupt the BGP routing table, which could result in network instability. The vulnerability exists due to changes in the implementation of the BGP MPLS-Based Ethernet VPN RFC (RFC 7432) draft between IOS XE software releases. When the BGP Inclusive Multicast Ethernet Tag Route or BGP EVPN MAC/IP Advertisement Route update packet is received, it could be possible that the IP address length field is miscalculated. An attacker could exploit this vulnerability by sending a crafted BGP packet to an affected device after the BGP session was established. An exploit could allow the attacker to cause the affected device to reload or corrupt the BGP routing table; either outcome would result in a DoS. The vulnerability may be triggered when the router receives a crafted BGP message from a peer on an existing BGP session. This vulnerability affects all releases of Cisco IOS XE Software prior to software release 16.3 that support BGP EVPN configurations. If the device is not configured for EVPN, it is not vulnerable. Cisco Bug IDs: CSCui67191, CSCvg52875.
Metrics
No CVSS v4.0
Attack Vector Network
Attack Complexity High
Privileges Required None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
User Interaction None
No CVSS v3.0
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
AV:N/AC:M/Au:N/C:N/I:N/A:C
This CVE is in the KEV database since March 3, 2022.
Exploitation active
Automatable yes
Technical Impact partial
Affected Vendors & Products
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Cisco |
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Configuration 1 [-]
AND |
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No data.
References
History
Fri, 15 Nov 2024 18:15:00 +0000
Type | Values Removed | Values Added |
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Metrics |
kev
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MITRE
Status: PUBLISHED
Assigner: cisco
Published: 2018-03-27T09:00:00
Updated: 2024-11-15T17:54:30.185Z
Reserved: 2017-08-03T00:00:00
Link: CVE-2017-12319
Vulnrichment
Updated: 2024-08-05T18:36:55.657Z
NVD
Status : Analyzed
Published: 2018-03-27T09:29:00.280
Modified: 2024-07-16T17:25:28.140
Link: CVE-2017-12319
Redhat
No data.