Detections
Analytics

Moxa PT-7528 and PT-7828 Series Weak Cryptographic Algorithm (CVE-2020-6987)

high Tenable OT Security Plugin ID 501529

Synopsis

The remote OT asset is affected by a vulnerability.

Description

In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9 or lower, the affected products use a weak cryptographic algorithm, which may allow confidential information to be disclosed.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

See Also

https://www.us-cert.gov/ics/advisories/icsa-20-056-03

Plugin Details

Severity: High

ID: 501529

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 8/2/2023

Updated: 9/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2020-6987

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:moxa:pt-7528-12mst-12tx-4gsfp-hv_firmware, cpe:/o:moxa:pt-7828-f-24_firmware, cpe:/o:moxa:pt-7828-r-hv-hv_firmware, cpe:/o:moxa:pt-7528-24tx-wv-wv_firmware, cpe:/o:moxa:pt-7528-16mst-8tx-4gsfp-wv-wv_firmware, cpe:/o:moxa:pt-7828-r-48_firmware, cpe:/o:moxa:pt-7528-20msc-4tx-4gsfp-hv-hv_firmware, cpe:/o:moxa:pt-7528-8msc-16tx-4gsfp-wv_firmware, cpe:/o:moxa:pt-7528-12msc-12tx-4gsfp-hv_firmware, cpe:/o:moxa:pt-7828-f-48-hv_firmware, cpe:/o:moxa:pt-7828-f-hv_firmware, cpe:/o:moxa:pt-7828-r-24-24_firmware, cpe:/o:moxa:pt-7828-r-48-hv_firmware, cpe:/o:moxa:pt-7528-8msc-16tx-4gsfp-hv-hv_firmware, cpe:/o:moxa:pt-7528-20mst-4tx-4gsfp-hv_firmware, cpe:/o:moxa:pt-7528-24tx-hv-hv_firmware, cpe:/o:moxa:pt-7528-24tx-wv_firmware, cpe:/o:moxa:pt-7528-8mst-16tx-4gsfp-hv-hv_firmware, cpe:/o:moxa:pt-7528-12msc-12tx-4gsfp-wv-wv_firmware, cpe:/o:moxa:pt-7528-16msc-8tx-4gsfp-wv-wv_firmware, cpe:/o:moxa:pt-7528-8mst-16tx-4gsfp-hv_firmware, cpe:/o:moxa:pt-7528-8msc-16tx-4gsfp-wv-wv_firmware, cpe:/o:moxa:pt-7528-12mst-12tx-4gsfp-wv-wv_firmware, cpe:/o:moxa:pt-7828-f-48-48_firmware, cpe:/o:moxa:pt-7528-12mst-12tx-4gsfp-wv_firmware, cpe:/o:moxa:pt-7828-f-24-hv_firmware, cpe:/o:moxa:pt-7528-12msc-12tx-4gsfp-hv-hv_firmware, cpe:/o:moxa:pt-7828-r-24-hv_firmware, cpe:/o:moxa:pt-7528-20msc-4tx-4gsfp-wv_firmware, cpe:/o:moxa:pt-7828-r-24_firmware, cpe:/o:moxa:pt-7828-r-48-48_firmware, cpe:/o:moxa:pt-7528-8mst-16tx-4gsfp-wv-wv_firmware, cpe:/o:moxa:pt-7528-20mst-4tx-4gsfp-wv-wv_firmware, cpe:/o:moxa:pt-7528-8msc-16tx-4gsfp-hv_firmware, cpe:/o:moxa:pt-7528-24tx-wv-hv_firmware, cpe:/o:moxa:pt-7528-20mst-4tx-4gsfp-wv_firmware, cpe:/o:moxa:pt-7828-r-hv_firmware, cpe:/o:moxa:pt-7528-20mst-4tx-4gsfp-hv-hv_firmware, cpe:/o:moxa:pt-7528-24tx-hv_firmware, cpe:/o:moxa:pt-7828-f-hv-hv_firmware, cpe:/o:moxa:pt-7528-12mst-12tx-4gsfp-hv-hv_firmware, cpe:/o:moxa:pt-7528-16mst-8tx-4gsfp-wv_firmware, cpe:/o:moxa:pt-7528-20msc-4tx-4gsfp-wv-wv_firmware, cpe:/o:moxa:pt-7528-16mst-8tx-4gsfp-hv-hv_firmware, cpe:/o:moxa:pt-7528-16msc-8tx-4gsfp-wv_firmware, cpe:/o:moxa:pt-7828-f-48_firmware, cpe:/o:moxa:pt-7528-16msc-8tx-4gsfp-hv-hv_firmware, cpe:/o:moxa:pt-7528-16mst-8tx-4gsfp-hv_firmware, cpe:/o:moxa:pt-7828-f-24-24_firmware, cpe:/o:moxa:pt-7528-8ssc-16tx-4gsfp-hv-hv_firmware, cpe:/o:moxa:pt-7528-8mst-16tx-4gsfp-wv_firmware, cpe:/o:moxa:pt-7528-12msc-12tx-4gsfp-wv_firmware, cpe:/o:moxa:pt-7528-8ssc-16tx-4gsfp-wv-wv_firmware, cpe:/o:moxa:pt-7528-16msc-8tx-4gsfp-hv_firmware, cpe:/o:moxa:pt-7528-20msc-4tx-4gsfp-hv_firmware

Required KB Items: Tenable.ot/Moxa

Exploit Ease: No known exploits are available

Patch Publication Date: 3/24/2020

Vulnerability Publication Date: 3/24/2020

Reference Information

CVE: CVE-2020-6987

CWE: 327

ICSA: 20-056-03