CVE-2020-3479
7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: NVD
Description
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.
Affected (2)
Configuration A
| Vulnerable Software | Affected Versions |
|---|---|
| All versions | |
| All versions |
| Running on/with | Platform Versions |
|---|---|
Cisco 1100 Integrated Services Router | All versions |
Cisco 1101 Integrated Services Router | All versions |
Cisco 1109 Integrated Services Router | All versions |
Cisco 1111x Integrated Services Router | All versions |
Cisco 111x Integrated Services Router | All versions |
Cisco 1120 Integrated Services Router | All versions |
Cisco 1160 Integrated Services Router | All versions |
Cisco 4221 Integrated Services Router | All versions |
Cisco 4321 Integrated Services Router | All versions |
Cisco 4331 Integrated Services Router | All versions |
Cisco 4351 Integrated Services Router | All versions |
Cisco 4431 Integrated Services Router | All versions |
Cisco 4451 X Integrated Services Router | All versions |
Cisco 4461 Integrated Services Router | All versions |
Cisco Asr 1001 Hx | All versions |
Cisco Asr 1001 X | All versions |
Cisco Asr 1002 Hx | All versions |
Cisco Asr 1002 X | All versions |
Cisco Asr 1004 | All versions |
Cisco Asr 1006 | All versions |
Cisco Asr 1006 X | All versions |
Cisco Asr 1009 X | All versions |
Cisco Asr 1013 | All versions |
Cisco Cloud Services Router 1000v | All versions |
Related CWEs
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.
CWE-400
Uncontrolled Resource Consumption
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
References (2)
Source: psirt@cisco.com
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Timeline
No history available yet.