Exploited
high
7.1
CWE
20
Advisory Published
Updated

CVE-2017-12319: Cisco IOS XE Software Ethernet Virtual Private Network Border Gateway Protocol Denial-of-Service Vulnerability

First published: Tue Mar 27 2018(Updated: )

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.

Credit: ykramarz@cisco.com ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco IOS=15.4\(1\)s
Cisco IOS XE<16.3
Cisco IOS XE Software
All of
Any of
Cisco IOS=15.4\(1\)s
Cisco IOS XE<16.3
Any of
Cisco 1000 Integrated Services Router
Cisco 1100-4g\/6g Integrated Services Router
Cisco 1100-4g Integrated Services Router
Cisco 1100-4gltegb Integrated Services Router
Cisco 1100-4gltena Integrated Services Router
Cisco 1100-4p Integrated Services Router
Cisco 1100-6g Integrated Services Router
Cisco 1100-8p Integrated Services Router
Cisco 1100-lte Integrated Services Router
Cisco 1100 Integrated Services Router
Cisco 1101-4p Integrated Services Router
Cisco 1101 Integrated Services Router
Cisco 1109-2p Integrated Services Router
Cisco 1109-4p Integrated Services Router
Cisco 1109 Integrated Services Router
Cisco 1111x-8p Integrated Services Router
Cisco 1111x Integrated Services Router
Cisco 111x Integrated Services Router
Cisco 1120 Integrated Services Router
Cisco 1131 Integrated Services Router
Cisco 1160 Integrated Services Router
Cisco 1801 Integrated Service Router
Cisco 1802 Integrated Service Router
Cisco 1803 Integrated Service Router
Cisco 1811 Integrated Service Router
Cisco 1812 Integrated Service Router
Cisco 1841 Integrated Service Router
Cisco 1861 Integrated Service Router
Cisco 1905 Integrated Services Router
Cisco 1906c Integrated Services Router
Cisco 1921 Integrated Services Router
Cisco 1941 Integrated Services Router
Cisco 1941w Integrated Services Router
Cisco 4000 Integrated Services Router
Cisco 422 Integrated Services Router
Cisco 4221 Integrated Services Router
Cisco 4321\/k9-rf Integrated Services Router
Cisco 4321\/k9-ws Integrated Services Router
Cisco 4321\/k9 Integrated Services Router
Cisco 4321 Integrated Services Router
Cisco 4331\/k9-rf Integrated Services Router
Cisco 4331\/k9-ws Integrated Services Router
Cisco 4331\/k9 Integrated Services Router
Cisco 4331 Integrated Services Router
Cisco 4351\/k9-rf Integrated Services Router
Cisco 4351\/k9-ws Integrated Services Router
Cisco 4351\/k9 Integrated Services Router
Cisco 4351 Integrated Services Router
Cisco 4431 Integrated Services Router
Cisco 44461 Integrated Services Router
Cisco 4451-x Integrated Services Router
Cisco 4451 Integrated Services Router
Cisco 4461 Integrated Services Router
Cisco 8101-32fh
Cisco 8101-32h
Cisco 8102-64h
Cisco 8201
Cisco 8201-32fh
Cisco 8202
Cisco 8208
Cisco 8212
Cisco 8218
Cisco 8800 12-slot
Cisco 8800 18-slot
Cisco 8800 4-slot
Cisco 8800 8-slot
Cisco 8804
Cisco 8808
Cisco 8812
Cisco 8818
Cisco 8831
Cisco 9800-40
Cisco 9800-80
Cisco 9800-cl
Cisco 9800-l
Cisco ASR 1000
Cisco Asr 1000-esp100
Cisco Asr 1000-esp100-x
Cisco Asr 1000-esp200-x
Cisco Asr 1000-x
Cisco Asr 1001
Cisco Asr 1001-hx
Cisco Asr 1001-hx R
Cisco Asr 1001-x
Cisco Asr 1001-x R
Cisco Asr 1002
Cisco Asr 1002-hx
Cisco Asr 1002-hx R
Cisco Asr 1002-x
Cisco Asr 1002-x R
Cisco Asr 1004
Cisco Asr 1006
Cisco Asr 1006-x
Cisco Asr 1009-x
Cisco Asr 1013
Cisco Asr 1023
Cisco Asr 900
Cisco Asr 901-12c-f-d
Cisco Asr 901-12c-ft-d
Cisco Asr 901-4c-f-d
Cisco Asr 901-4c-ft-d
Cisco Asr 901-6cz-f-a
Cisco Asr 901-6cz-f-d
Cisco Asr 901-6cz-fs-a
Cisco Asr 901-6cz-fs-d
Cisco Asr 901-6cz-ft-a
Cisco Asr 901-6cz-ft-d
Cisco Asr 901s-2sg-f-ah
Cisco Asr 901s-2sg-f-d
Cisco Asr 901s-3sg-f-ah
Cisco Asr 901s-3sg-f-d
Cisco Asr 901s-4sg-f-d
Cisco Asr 902
Cisco Asr 902u
Cisco Catalyst 8200
Cisco Catalyst 8300
Cisco Catalyst 8300-1n1s-4t2x
Cisco Catalyst 8300-1n1s-6t
Cisco Catalyst 8300-2n2s-4t2x
Cisco Catalyst 8300-2n2s-6t
Cisco Catalyst 8500
Cisco Catalyst 8500-4qc
Cisco Catalyst 8500l
Cisco Catalyst 8510csr
Cisco Catalyst 8510msr
Cisco Catalyst 8540csr
Cisco Catalyst 8540msr
Cisco Catalyst 9200
Cisco Catalyst 9200cx
Cisco Catalyst 9200l
Cisco Catalyst 9300
Cisco Catalyst 9300-24p-a
Cisco Catalyst 9300-24p-e
Cisco Catalyst 9300-24s-a
Cisco Catalyst 9300-24s-e
Cisco Catalyst 9300-24t-a
Cisco Catalyst 9300-24t-e
Cisco Catalyst 9300-24u-a
Cisco Catalyst 9300-24u-e
Cisco Catalyst 9300-24ux-a
Cisco Catalyst 9300-24ux-e
Cisco Catalyst 9300-48p-a
Cisco Catalyst 9300-48p-e
Cisco Catalyst 9300-48s-a
Cisco Catalyst 9300-48s-e
Cisco Catalyst 9300-48t-a
Cisco Catalyst 9300-48t-e
Cisco Catalyst 9300-48u-a
Cisco Catalyst 9300-48u-e
Cisco Catalyst 9300-48un-a
Cisco Catalyst 9300-48un-e
Cisco Catalyst 9300-48uxm-a
Cisco Catalyst 9300-48uxm-e
Cisco Catalyst 9300l
Cisco Catalyst 9300l-24p-4g-a
Cisco Catalyst 9300l-24p-4g-e
Cisco Catalyst 9300l-24p-4x-a
Cisco Catalyst 9300l-24p-4x-e
Cisco Catalyst 9300l-24t-4g-a
Cisco Catalyst 9300l-24t-4g-e
Cisco Catalyst 9300l-24t-4x-a
Cisco Catalyst 9300l-24t-4x-e
Cisco Catalyst 9300l-48p-4g-a
Cisco Catalyst 9300l-48p-4g-e
Cisco Catalyst 9300l-48p-4x-a
Cisco Catalyst 9300l-48p-4x-e
Cisco Catalyst 9300l-48t-4g-a
Cisco Catalyst 9300l-48t-4g-e
Cisco Catalyst 9300l-48t-4x-a
Cisco Catalyst 9300l-48t-4x-e
Cisco Catalyst 9300l Stack
Cisco Catalyst 9300lm
Cisco Catalyst 9300x
Cisco Catalyst 9400
Cisco Catalyst 9400 Supervisor Engine-1
Cisco Catalyst 9407r
Cisco Catalyst 9410r
Cisco Catalyst 9500
Cisco Catalyst 9500h
Cisco Catalyst 9600
Cisco Catalyst 9600 Supervisor Engine-1
Cisco Catalyst 9600x
Cisco Catalyst 9800
Cisco Catalyst 9800-40
Cisco Catalyst 9800-80
Cisco Catalyst 9800-cl
Cisco Catalyst 9800-l
Cisco Catalyst 9800-l-c
Cisco Catalyst 9800-l-f
Cisco Catalyst Ie3200 Rugged Switch
Cisco Catalyst Ie3300 Rugged Switch
Cisco Cloud Services Router 1000v
Cisco Esr-6300-con-k9
Cisco Esr-6300-ncp-k9
Cisco Integrated Services Virtual Router
Cisco Network Convergence System 520

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID for this Cisco IOS XE Software vulnerability?

    The vulnerability ID for this Cisco IOS XE Software vulnerability is CVE-2017-12319.

  • What is the severity level of CVE-2017-12319?

    CVE-2017-12319 has a severity level of high.

  • How does CVE-2017-12319 affect Cisco IOS XE Software?

    CVE-2017-12319 can cause the device to reload, resulting in a denial of service (DoS) condition, or potentially corrupt the BGP routing table.

  • What software versions are affected by CVE-2017-12319?

    Cisco IOS XE Software versions 15.4(1)s and up to 16.3 are affected by CVE-2017-12319.

  • Where can I find more information about CVE-2017-12319?

    You can find more information about CVE-2017-12319 on the SecurityFocus and Cisco Security Advisories websites.

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