CVE-2017-12319

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Summary

CVECVE-2017-12319
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2018-03-27 09:29:00 UTC
Updated2019-10-09 23:22:00 UTC
DescriptionA 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.

Risk And Classification

EPSS: 0.053470000 probability, percentile 0.917500000 (date 2026-07-21)

CISA KEV: Listed on 2022-03-03; due 2022-03-24; ransomware use Unknown

Problem Types: CWE-20

CISA Known Exploited Vulnerability

VendorCisco
ProductIOS XE Software
NameCisco IOS XE Software Ethernet Virtual Private Network Border Gateway Protocol Denial-of-Service Vulnerability
Required ActionApply updates per vendor instructions.
Noteshttps://nvd.nist.gov/vuln/detail/CVE-2017-12319

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Cisco Ios 15.4(1)s All All All
Operating System Cisco Ios 15.4\(1\)s All All All
Operating System Cisco Ios 15.4\(1\)s All All All
Operating System Cisco Ios Xe All All All All
Operating System Cisco Ios Xe All All All All

References

ReferenceSourceLinkTags
Cisco IOS XE Software CVE-2017-12319 Denial of Service Vulnerability BID www.securityfocus.com Third Party Advisory, VDB Entry
Cisco IOS XE Software Ethernet Virtual Private Network Border Gateway Protocol Denial of Service Vulnerability CONFIRM tools.cisco.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

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