critical
9.8
CWE
787 121 119
Advisory Published
Updated

CVE-2020-6989: Buffer Overflow

First published: Tue Mar 24 2020(Updated: )

In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9 or lower, a buffer overflow in the web server allows remote attackers to cause a denial-of-service condition or execute arbitrary code.

Credit: ics-cert@hq.dhs.gov

Affected SoftwareAffected VersionHow to fix
Moxa PT-7528-24TX-HV<=4.0
Moxa PT-7528-24TX-HV Firmware
Moxa PT-7528-24TX-HV<=4.0
Moxa PT-7528-24TX-HV
Moxa PT-7528-24TX-WV<=4.0
Moxa PT-7528-24TX-WV Firmware
Moxa PT-7528-24TX-WV Firmware<=4.0
Moxa Pt-7528-24tx-wv-hv Firmware
Moxa PT-7528-24TX-WV Firmware<=4.0
Moxa Pt-7528-24tx-wv-wv Firmware
Moxa Pt-7528-8mst-16tx-4gsfp-hv-hv Firmware<=4.0
Moxa PT-7528-12MSC-12TX-4GSFP-HV Firmware
Moxa PT-7528-12MSC-12TX-4GSFP-HV Firmware<=4.0
Moxa Pt-7528-12msc-12tx-4gsfp-hv-hv Firmware
Moxa Pt-7528-12msc-12tx-4gsfp-wv Firmware<=4.0
Moxa Pt-7528-12msc-12tx-4gsfp-wv Firmware
Moxa Pt-7528-12msc-12tx-4gsfp-wv Firmware<=4.0
Moxa PT-7528-12MSC-12TX-4GSFP-WV
Moxa PT-7528-12MST-12TX-4GSFP-HV Firmware<=4.0
Moxa PT-7528-12MST-12TX-4GSFP-HV Firmware
Moxa PT-7528-12MST-12TX-4GSFP-HV Firmware<=4.0
Moxa Pt-7528-12mst-12tx-4gsfp-hv-hv Firmware
Moxa PT-7528-12MST-12TX-4GSFP-WV Firmware<=4.0
Moxa PT-7528-12MST-12TX-4GSFP-WV Firmware
Moxa PT-7528-12MST-12TX-4GSFP-WV Firmware<=4.0
Moxa PT-7528-12MST-12TX-4GSFP-WV
Moxa PT-7528-20MSC-4TX-4GSFP-HV Firmware<=4.0
Moxa PT-7528-16MSC-8TX-4GSFP-HV Firmware
Moxa PT-7528-16MSC-8TX-4GSFP-HV Firmware<=4.0
Moxa PT-7528-16MSC-8TX-4GSFP-HV
Moxa PT-7528-16MSC-8TX-4GSFP-WV-WV Firmware<=4.0
Moxa PT-7528-16MSC-8TX-4GSFP-WV Firmware
Moxa PT-7528-16MSC-8TX-4GSFP-WV<=4.0
Moxa PT-7528-16MSC-8TX-4GSFP-WV-WV Firmware
Moxa PT-7528<=4.0
Moxa Pt-7528-16mst-8tx-4gsfp-hv Firmware
Moxa PT-7528<=4.0
Moxa PT-7528
Moxa PT-7528<=4.0
Moxa PT-7528-16MST-8TX-4GSFP-WV Firmware
Moxa PT-7528<=4.0
Moxa PT-7528-16MST-8TX-4GSFP-WV
Moxa PT-7528-20MSC-4TX-4GSFP-HV Firmware<=4.0
Moxa PT-7528-20MSC-4TX-4GSFP-HV Firmware
Moxa PT-7528-20MSC-4TX-4GSFP-HV<=4.0
Moxa PT-7528-20MSC-4TX-4GSFP-HV
Moxa PT-7528-20MSC-4TX-4GSFP-WV Firmware<=4.0
Moxa PT-7528-20MSC-4TX-4GSFP-WV Firmware
Moxa Pt-7528-20msc-4tx-4gsfp-wv Firmware<=4.0
Moxa Pt-7528-20msc-4tx-4gsfp-wv Firmware
Moxa PT-7528-20MST-4TX-4GSFP-HV Firmware<=4.0
Moxa PT-7528-20MST-4TX-4GSFP-HV Firmware
Moxa PT-7528-20mst-4tx-4gsfp-hv Firmware<=4.0
Moxa PT-7528-20MST-4TX-4GSFP-HV
Moxa PT-7528-20mst-4tx-4gsfp-wv Firmware<=4.0
Moxa PT-7528-20MST-4TX-4GSFP-WV Firmware
Moxa PT-7528-20MST-4TX-4GSFP-WV Firmware<=4.0
Moxa Pt-7528-20mst-4tx-4gsfp-wv Firmware
Moxa PT-7528-8MSC-16TX-4GSFP-HV<=4.0
Moxa PT-7528-8MSC-16TX-4GSFP-HV Firmware
Moxa PT-7528-8MSC-16TX-4GSFP-HV Firmware<=4.0
Moxa PT-7528-8MSC-16TX-4GSFP-HV
Moxa PT-7528-8MST-16TX-4GSFP-WV Firmware<=4.0
Moxa PT-7528-8MSC-16TX-4GSFP-WV Firmware
Moxa PT-7528-8MSC-16TX-4GSFP-WV Firmware<=4.0
Moxa Pt-7528-8msc-16tx-4gsfp-wv-wv Firmware
Moxa Pt-7528-8mst-16tx-4gsfp-hv-hv Firmware<=4.0
Moxa PT-7528 Series
Moxa PT-7528 Firmware<=4.0
Moxa PT-7528-8MST-16TX-4GSFP-HV
Moxa PT-7528-8MST-16TX-4GSFP-WV<=4.0
Moxa PT-7528-8MST-16TX-4GSFP-WV Firmware
Moxa Pt-7528-8mst-16tx-4gsfp-wv Firmware<=4.0
Moxa PT-7528
Moxa PT-7528-8SSC-16TX-4GSFP-HV Firmware<=4.0
Moxa PT-7528-8SSC-16TX-4GSFP-HV Firmware
Moxa PT-7528-8SSC-16TX-4GSFP-WV-WV Firmware<=4.0
Moxa PT-7528-8SSC-16TX-4GSFP-WV-WV Firmware
Moxa PT-7828-F-24<=3.9
Moxa PT-7828-F-24 Firmware
Moxa PT-7828-F-24 Firmware<=3.9
Moxa PT-7828-F-24 Firmware
Moxa PT-7828-F-24 Firmware<=3.9
Moxa PT-7828-F-24-HV Firmware
Moxa PT-7828-F-48-HV Firmware<=3.9
Moxa PT-7828-F-48-HV Firmware
Moxa PT-7828-F-48-48 Firmware<=3.9
Moxa Pt-7828-f-48-48 Firmware
Moxa PT-7828-F-48-HV Firmware<=3.9
Moxa PT-7828-F-48-HV Firmware
Moxa PT-7828-F-HV-HV Firmware<=3.9
Moxa PT-7828-F-HV Firmware
Moxa PT-7828-F-HV-HV<=3.9
Moxa PT-7828-F-HV
Moxa PT-7828-R-24 Firmware<=3.9
Moxa PT-7828-R-24 Firmware
Moxa PT-7828-R-24 Firmware<=3.9
Moxa PT-7828-R-24-24 Firmware
Moxa PT-7828-R-24-HV Firmware<=3.9
Moxa PT-7828-R-24-HV Firmware
Moxa PT-7828-R-48-HV Firmware<=3.9
Moxa PT-7828-R-48-48 Firmware
Moxa PT-7828-R-48 Firmware<=3.9
Moxa PT-7828-R-48-48 Firmware
Moxa PT-7828-R-48-HV Firmware<=3.9
Moxa PT-7828-R-48-HV Firmware
Moxa Pt-7828-r-hv-hv Firmware<=3.9
Moxa PT-7828-R-HV Firmware
Moxa PT-7828-R-HV Firmware<=3.9
Moxa PT-7828-R-HV Firmware

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2020-6989?

    CVE-2020-6989 is classified as a high severity vulnerability due to its potential to cause denial-of-service or execute arbitrary code remotely.

  • How do I fix CVE-2020-6989?

    To fix CVE-2020-6989, it is recommended to update to Moxa PT-7528 series firmware version 4.1 or higher and PT-7828 series firmware version 4.0 or higher.

  • What devices are affected by CVE-2020-6989?

    CVE-2020-6989 affects Moxa PT-7528 series firmware versions 4.0 or lower and PT-7828 series firmware versions 3.9 or lower.

  • What type of attack can exploit CVE-2020-6989?

    CVE-2020-6989 can be exploited through a buffer overflow attack in the web server, allowing attackers to potentially execute arbitrary code.

  • Is there a patch available for CVE-2020-6989?

    Yes, Moxa has released firmware updates that address the vulnerability for affected devices.

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