Vulnerability Monitor

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CVE-2017-12319

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.9, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 198 products from cisco, from cisco, from cisco and 195 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2018-03-27T09:29:00.280

Last Modified

2026-01-13T22:20:14.280

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 5.9 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

8.6

Impact Score

6.9

Weaknesses

Type: Secondary
CWE-20
Type: Primary
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	cisco	ios	15.4\(1\)s	Yes
Operating System	cisco	ios_xe	< 16.3	Yes
Hardware	cisco	1000_integrated_services_router	-	No
Hardware	cisco	1100-4g\/6g_integrated_services_router	-	No
Hardware	cisco	1100-4g_integrated_services_router	-	No
Hardware	cisco	1100-4gltegb_integrated_services_router	-	No
Hardware	cisco	1100-4gltena_integrated_services_router	-	No
Hardware	cisco	1100-4p_integrated_services_router	-	No
Hardware	cisco	1100-6g_integrated_services_router	-	No
Hardware	cisco	1100-8p_integrated_services_router	-	No
Hardware	cisco	1100-lte_integrated_services_router	-	No
Hardware	cisco	1100_integrated_services_router	-	No
Hardware	cisco	1101-4p_integrated_services_router	-	No
Hardware	cisco	1101_integrated_services_router	-	No
Hardware	cisco	1109-2p_integrated_services_router	-	No
Hardware	cisco	1109-4p_integrated_services_router	-	No
Hardware	cisco	1109_integrated_services_router	-	No
Hardware	cisco	1111x-8p_integrated_services_router	-	No
Hardware	cisco	1111x_integrated_services_router	-	No
Hardware	cisco	111x_integrated_services_router	-	No
Hardware	cisco	1120_integrated_services_router	-	No
Hardware	cisco	1131_integrated_services_router	-	No
Hardware	cisco	1160_integrated_services_router	-	No
Hardware	cisco	1801_integrated_service_router	-	No
Hardware	cisco	1802_integrated_service_router	-	No
Hardware	cisco	1803_integrated_service_router	-	No
Hardware	cisco	1811_integrated_service_router	-	No
Hardware	cisco	1812_integrated_service_router	-	No
Hardware	cisco	1841_integrated_service_router	-	No
Hardware	cisco	1861_integrated_service_router	-	No
Hardware	cisco	1905_integrated_services_router	-	No
Hardware	cisco	1906c_integrated_services_router	-	No
Hardware	cisco	1921_integrated_services_router	-	No
Hardware	cisco	1941_integrated_services_router	-	No
Hardware	cisco	1941w_integrated_services_router	-	No
Hardware	cisco	4000_integrated_services_router	-	No
Hardware	cisco	422_integrated_services_router	-	No
Hardware	cisco	4221_integrated_services_router	-	No
Hardware	cisco	4321\/k9-rf_integrated_services_router	-	No
Hardware	cisco	4321\/k9-ws_integrated_services_router	-	No
Hardware	cisco	4321\/k9_integrated_services_router	-	No
Hardware	cisco	4321_integrated_services_router	-	No
Hardware	cisco	4331\/k9-rf_integrated_services_router	-	No
Hardware	cisco	4331\/k9-ws_integrated_services_router	-	No
Hardware	cisco	4331\/k9_integrated_services_router	-	No
Hardware	cisco	4331_integrated_services_router	-	No
Hardware	cisco	4351\/k9-rf_integrated_services_router	-	No
Hardware	cisco	4351\/k9-ws_integrated_services_router	-	No
Hardware	cisco	4351\/k9_integrated_services_router	-	No
Hardware	cisco	4351_integrated_services_router	-	No
Hardware	cisco	4431_integrated_services_router	-	No
Hardware	cisco	44461_integrated_services_router	-	No
Hardware	cisco	4451-x_integrated_services_router	-	No
Hardware	cisco	4451_integrated_services_router	-	No
Hardware	cisco	4461_integrated_services_router	-	No
Hardware	cisco	8101-32fh	-	No
Hardware	cisco	8101-32h	-	No
Hardware	cisco	8102-64h	-	No
Hardware	cisco	8201	-	No
Hardware	cisco	8201-32fh	-	No
Hardware	cisco	8202	-	No
Hardware	cisco	8208	-	No
Hardware	cisco	8212	-	No
Hardware	cisco	8218	-	No
Hardware	cisco	8800_12-slot	-	No
Hardware	cisco	8800_18-slot	-	No
Hardware	cisco	8800_4-slot	-	No
Hardware	cisco	8800_8-slot	-	No
Hardware	cisco	8804	-	No
Hardware	cisco	8808	-	No
Hardware	cisco	8812	-	No
Hardware	cisco	8818	-	No
Hardware	cisco	8831	-	No
Hardware	cisco	9800-40	-	No
Hardware	cisco	9800-80	-	No
Hardware	cisco	9800-cl	-	No
Hardware	cisco	9800-l	-	No
Hardware	cisco	asr_1000	-	No
Hardware	cisco	asr_1000-esp100	-	No
Hardware	cisco	asr_1000-esp100-x	-	No
Hardware	cisco	asr_1000-esp200-x	-	No
Hardware	cisco	asr_1000-x	-	No
Hardware	cisco	asr_1001	-	No
Hardware	cisco	asr_1001-hx	-	No
Hardware	cisco	asr_1001-hx_r	-	No
Hardware	cisco	asr_1001-x	-	No
Hardware	cisco	asr_1001-x_r	-	No
Hardware	cisco	asr_1002	-	No
Hardware	cisco	asr_1002-hx	-	No
Hardware	cisco	asr_1002-hx_r	-	No
Hardware	cisco	asr_1002-x	-	No
Hardware	cisco	asr_1002-x_r	-	No
Hardware	cisco	asr_1004	-	No
Hardware	cisco	asr_1006	-	No
Hardware	cisco	asr_1006-x	-	No
Hardware	cisco	asr_1009-x	-	No
Hardware	cisco	asr_1013	-	No
Hardware	cisco	asr_1023	-	No
Hardware	cisco	asr_900	-	No
Hardware	cisco	asr_901-12c-f-d	-	No
Hardware	cisco	asr_901-12c-ft-d	-	No
Hardware	cisco	asr_901-4c-f-d	-	No
Hardware	cisco	asr_901-4c-ft-d	-	No
Hardware	cisco	asr_901-6cz-f-a	-	No
Hardware	cisco	asr_901-6cz-f-d	-	No
Hardware	cisco	asr_901-6cz-fs-a	-	No
Hardware	cisco	asr_901-6cz-fs-d	-	No
Hardware	cisco	asr_901-6cz-ft-a	-	No
Hardware	cisco	asr_901-6cz-ft-d	-	No
Hardware	cisco	asr_901s-2sg-f-ah	-	No
Hardware	cisco	asr_901s-2sg-f-d	-	No
Hardware	cisco	asr_901s-3sg-f-ah	-	No
Hardware	cisco	asr_901s-3sg-f-d	-	No
Hardware	cisco	asr_901s-4sg-f-d	-	No
Hardware	cisco	asr_902	-	No
Hardware	cisco	asr_902u	-	No
Hardware	cisco	catalyst_8200	-	No
Hardware	cisco	catalyst_8300	-	No
Hardware	cisco	catalyst_8300-1n1s-4t2x	-	No
Hardware	cisco	catalyst_8300-1n1s-6t	-	No
Hardware	cisco	catalyst_8300-2n2s-4t2x	-	No
Hardware	cisco	catalyst_8300-2n2s-6t	-	No
Hardware	cisco	catalyst_8500	-	No
Hardware	cisco	catalyst_8500-4qc	-	No
Hardware	cisco	catalyst_8500l	-	No
Hardware	cisco	catalyst_8510csr	-	No
Hardware	cisco	catalyst_8510msr	-	No
Hardware	cisco	catalyst_8540csr	-	No
Hardware	cisco	catalyst_8540msr	-	No
Hardware	cisco	catalyst_9200	-	No
Hardware	cisco	catalyst_9200cx	-	No
Hardware	cisco	catalyst_9200l	-	No
Hardware	cisco	catalyst_9300	-	No
Hardware	cisco	catalyst_9300-24p-a	-	No
Hardware	cisco	catalyst_9300-24p-e	-	No
Hardware	cisco	catalyst_9300-24s-a	-	No
Hardware	cisco	catalyst_9300-24s-e	-	No
Hardware	cisco	catalyst_9300-24t-a	-	No
Hardware	cisco	catalyst_9300-24t-e	-	No
Hardware	cisco	catalyst_9300-24u-a	-	No
Hardware	cisco	catalyst_9300-24u-e	-	No
Hardware	cisco	catalyst_9300-24ux-a	-	No
Hardware	cisco	catalyst_9300-24ux-e	-	No
Hardware	cisco	catalyst_9300-48p-a	-	No
Hardware	cisco	catalyst_9300-48p-e	-	No
Hardware	cisco	catalyst_9300-48s-a	-	No
Hardware	cisco	catalyst_9300-48s-e	-	No
Hardware	cisco	catalyst_9300-48t-a	-	No
Hardware	cisco	catalyst_9300-48t-e	-	No
Hardware	cisco	catalyst_9300-48u-a	-	No
Hardware	cisco	catalyst_9300-48u-e	-	No
Hardware	cisco	catalyst_9300-48un-a	-	No
Hardware	cisco	catalyst_9300-48un-e	-	No
Hardware	cisco	catalyst_9300-48uxm-a	-	No
Hardware	cisco	catalyst_9300-48uxm-e	-	No
Hardware	cisco	catalyst_9300l	-	No
Hardware	cisco	catalyst_9300l-24p-4g-a	-	No
Hardware	cisco	catalyst_9300l-24p-4g-e	-	No
Hardware	cisco	catalyst_9300l-24p-4x-a	-	No
Hardware	cisco	catalyst_9300l-24p-4x-e	-	No
Hardware	cisco	catalyst_9300l-24t-4g-a	-	No
Hardware	cisco	catalyst_9300l-24t-4g-e	-	No
Hardware	cisco	catalyst_9300l-24t-4x-a	-	No
Hardware	cisco	catalyst_9300l-24t-4x-e	-	No
Hardware	cisco	catalyst_9300l-48p-4g-a	-	No
Hardware	cisco	catalyst_9300l-48p-4g-e	-	No
Hardware	cisco	catalyst_9300l-48p-4x-a	-	No
Hardware	cisco	catalyst_9300l-48p-4x-e	-	No
Hardware	cisco	catalyst_9300l-48t-4g-a	-	No
Hardware	cisco	catalyst_9300l-48t-4g-e	-	No
Hardware	cisco	catalyst_9300l-48t-4x-a	-	No
Hardware	cisco	catalyst_9300l-48t-4x-e	-	No
Hardware	cisco	catalyst_9300l_stack	-	No
Hardware	cisco	catalyst_9300lm	-	No
Hardware	cisco	catalyst_9300x	-	No
Hardware	cisco	catalyst_9400	-	No
Hardware	cisco	catalyst_9400_supervisor_engine-1	-	No
Hardware	cisco	catalyst_9407r	-	No
Hardware	cisco	catalyst_9410r	-	No
Hardware	cisco	catalyst_9500	-	No
Hardware	cisco	catalyst_9500h	-	No
Hardware	cisco	catalyst_9600	-	No
Hardware	cisco	catalyst_9600_supervisor_engine-1	-	No
Hardware	cisco	catalyst_9600x	-	No
Hardware	cisco	catalyst_9800	-	No
Hardware	cisco	catalyst_9800-40	-	No
Hardware	cisco	catalyst_9800-80	-	No
Hardware	cisco	catalyst_9800-cl	-	No
Hardware	cisco	catalyst_9800-l	-	No
Hardware	cisco	catalyst_9800-l-c	-	No
Hardware	cisco	catalyst_9800-l-f	-	No
Hardware	cisco	catalyst_ie3200_rugged_switch	-	No
Hardware	cisco	catalyst_ie3300_rugged_switch	-	No
Hardware	cisco	cloud_services_router_1000v	-	No
Hardware	cisco	esr-6300-con-k9	-	No
Hardware	cisco	esr-6300-ncp-k9	-	No
Hardware	cisco	integrated_services_virtual_router	-	No
Hardware	cisco	network_convergence_system_520	-	No

References

http://www.securityfocus.com/bid/101676 Broken Link, Third Party Advisory, VDB Entry ([email protected])
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171103-bgp Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/101676 Broken Link, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171103-bgp Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-12319 US Government Resource (134c704f-9b21-4f2e-91b3-4a467353bcc0)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.