Cisco IOS Software MP BGP EVPN DoS (cisco-sa-ios-bgp-evpn-dos-LNfYJxfF)

High Nessus Plugin ID 141231

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VPR Score: 3.6

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its self-reported version, IOS is affected by a denial of service (DoS) vulnerability in the Multiprotocol Border Gateway Protocol (MP-BGP) for the Layer 2 VPN (L2VPN) Ethernet VPN (EVPN) address family. An unauthenticated, remote attacker can exploit this, by sending BGP update messages with specific, malformed attributes to an affected device, to cause the device to crash.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvr81264 and CSCvr83128

See Also

http://www.nessus.org/u?90954329

Plugin Details

Severity: High

ID: 141231

File Name: cisco-sa-ios-bgp-evpn-dos-LNfYJxfF-ios.nasl

Version: 1.5

Type: local

Family: CISCO

Published: 2020/10/07

Updated: 2020/10/09

Dependencies: 47864

Risk Information

Risk Factor: High

VPR Score: 3.6

CVSS Score Source: CVE-2020-3479

CVSS v2.0

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/09/24

Vulnerability Publication Date: 2020/09/24

Reference Information

CVE: CVE-2020-3479

CISCO-BUG-ID: CSCvr81264, CSCvr83128

CISCO-SA: cisco-sa-ios-bgp-evpn-dos-LNfYJxfF

IAVA: 2020-A-0439

CWE: 20