Rockwell Automation RSLinx Classic ENGINE.dll Stack Buffer Overflow (CVE-2019-6553)

critical Nessus Plugin ID 123010


A SCADA application running on the remote host is affected by a remote code execution vulnerability.


The RSLinx Classic running on the remote host is affected by a remote code execution vulnerability due to a stack buffer overflow condition when handling an EtherNet/IP message received on TCP port 44818. An unauthenticated, remote attacker can exploit this issue, via a specially crafted message, to execute arbitrary code.


Patches are available for versions 4.10, 4.00.01, 3.90, 3.81, 3.80, 3.70, and 3.60. See vendor Knowledgebase Article ID 1085038 for more details.

See Also

Plugin Details

Severity: Critical

ID: 123010

File Name: scada_rslinx_classic_cve-2019-6553.nbin

Version: 1.18

Type: remote

Family: SCADA

Published: 3/22/2019

Updated: 2/14/2022

Risk Information

CVSS Score Source: CVE-2019-6553


Risk Factor: Medium

Score: 5.9


Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

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


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: cpe:/a:rockwellautomation:rslinx_classic

Required KB Items: SCADA/ethernetip/cip/tcp/identity/vendorname, SCADA/ethernetip/cip/tcp/identity/name

Exploit Ease: No known exploits are available

Patch Publication Date: 3/4/2019

Vulnerability Publication Date: 3/4/2019

Reference Information

CVE: CVE-2019-6553

BID: 107293

ICSA: 19-064-01

TRA: TRA-2019-11