CVE-2020-3479CWE-20

Cisco IOS and IOS XE Software MP-BGP EVPN Denial of Service Vulnerability

Medium · published September 24, 2020

CVSS v3.1
6.1
EPSS
1%
Percentile
65.3
In the wild
Unconfirmed
What it is

A vulnerability in the implementation of Multiprotocol Border Gateway Protocol (MP-BGP) for the Layer 2 VPN (L2VPN) Ethernet VPN (EVPN) address family in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of Border Gateway Protocol (BGP) update messages that contain crafted EVPN attributes. An attacker could exploit this vulnerability by sending BGP update messages with specific, malformed attributes to an affected device. A successful exploit could allow the attacker to cause an affected device to crash, resulting in a DoS condition.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.01097 · 65.3th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2020-09-24T17:52Z
EPSS history
Timeline
  • 24 SEP 17:52Z
    Cisco IOS and IOS XE Software MP-BGP EVPN Denial of Service Vulnerability
    cvelistv5