CVE-2017-12319

Warnung

EPSS 1.27%
Veröffentlicht 27.03.2018 09:29:00
Zuletzt bearbeitet 27.01.2025 19:13:34
Quelle psirt@cisco.com
Teams Watchlist Login
Unerledigt Login

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.

Betroffene Produkte Warnungen 1 Metriken 3 CWE 1 Referenzen 5

Daten sind bereitgestellt durch National Vulnerability Database (NVD)

Cisco ≫ Ios Version15.4(1)s

Cisco ≫ Ios Xe Version < 16.3

03.03.2022: CISA Known Exploited Vulnerabilities (KEV) Catalog

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

Schwachstelle

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.

Beschreibung

Apply updates per vendor instructions.

Erforderliche Maßnahmen

EPSS Metriken
Typ	Quelle	Score	Percentile
EPSS	FIRST.org	1.27%	0.776

CVSS Metriken
Quelle	Base Score	Exploit Score	Impact Score	Vector String
nvd@nist.gov	5.9	2.2	3.6	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd@nist.gov	7.1	8.6	6.9	AV:N/AC:M/Au:N/C:N/I:N/A:C

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

http://www.securityfocus.com/bid/101676

Third Party Advisory

Broken Link

VDB Entry

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171103-bgp

Vendor Advisory

https://nvd.nist.gov/vuln/detail/CVE-2017-12319

CVE Source (NVD)

https://cveawg.mitre.org/api/cve/CVE-2017-12319

CVE Source (JSON)

https://euvd.enisa.europa.eu/vulnerability/CVE-2017-12319

EUVD