Cisco IOS XE Software Ethernet Virtual Private Network Border Gateway Protocol Denial-of-Service Vulnerability
- Sévérité
- Moyenne5,9CVSS 3.1, Moyenne
- EPSS
- 5 %
- Publiée
- 27 mars 2018
- Mise à jour
- 17 juin 2026
Description
Le titre, la description et les consignes de l’éditeur sont cités depuis les enregistrements sources (en anglais).
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.
Faiblesse : CWE-20
Exploitée activement
Ajoutée au catalogue CISA KEV le 3 mars 2022
Date limite de remédiation fédérale : 24 mars 2022
Action requise : Apply updates per vendor instructions.
Prédiction d’exploitation
Probabilité d’exploitation de 5 % dans les 30 prochains jours (percentile 92 %).
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Produits concernés
Patcharo affiche cette vulnérabilité à titre d’information mais ne compare pas encore les versions de ce produit.
- n/a Cisco IOS XE · Cisco IOS XE
Références
Provenance
Chaque information de cette page provient des sources ci-dessous. Rien n’est rédigé par une IA.
- Cisco (CVE record)
- Cisco (CVE record) · 27 sept. 2026, 23:46 UTC · Analyseur patcharo-cve5/1.1.0
- CISA Known Exploited Vulnerabilities
- CISA Known Exploited Vulnerabilities · 27 sept. 2026, 23:42 UTC · Analyseur patcharo-kev/1.0.0
- NVD
- NVD · 27 sept. 2026, 23:44 UTC · Analyseur patcharo-nvd/1.0.0
- FIRST EPSS
- FIRST EPSS · 27 sept. 2026, 23:46 UTC · Analyseur patcharo-epss/1.0.0
Dernière vérification : 28 sept. 2026, 02:31 UTC