Strix
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CVE-2020-5527

HIGHCVSS 7.5/10EPSS 1.33%

Last modified

CVE-2020-5527 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. When MELSOFT transmission port (UDP/IP) of Mitsubishi Electric MELSEC iQ-R series (all versions), MELSEC iQ-F series (all versions), MELSEC Q series (all versions), MELSEC L series (all versions), and MELSEC F series (all versions) receives massive amount of data via unspecified vectors, resource consumption occurs and the port does not process the data properly. As a result, it may fall into a denial-of-service (DoS) condition. EPSS estimates a 1.33% chance of exploitation in the next 30 days.

Description

When MELSOFT transmission port (UDP/IP) of Mitsubishi Electric MELSEC iQ-R series (all versions), MELSEC iQ-F series (all versions), MELSEC Q series (all versions), MELSEC L series (all versions), and MELSEC F series (all versions) receives massive amount of data via unspecified vectors, resource consumption occurs and the port does not process the data properly. As a result, it may fall into a denial-of-service (DoS) condition. The vendor states this vulnerability only affects Ethernet communication functions.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.33%

67.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
MitsubishielectricCr800-Q FirmwareAll versions
MitsubishielectricFx3g FirmwareAll versions
MitsubishielectricFx3gc FirmwareAll versions
MitsubishielectricFx3s FirmwareAll versions
MitsubishielectricFx3u FirmwareAll versions
MitsubishielectricFx3uc FirmwareAll versions
MitsubishielectricFx5u FirmwareAll versions
MitsubishielectricFx5uc FirmwareAll versions
MitsubishielectricFx5uj FirmwareAll versions
MitsubishielectricL02cpu FirmwareAll versions
MitsubishielectricL02cpu-P FirmwareAll versions
MitsubishielectricL02scpu FirmwareAll versions
MitsubishielectricL02scpu-P FirmwareAll versions
MitsubishielectricL06cpu FirmwareAll versions
MitsubishielectricL06cpu-P FirmwareAll versions
MitsubishielectricL26cpu FirmwareAll versions
MitsubishielectricL26cpu-Bt FirmwareAll versions
MitsubishielectricL26cpu-P FirmwareAll versions
MitsubishielectricL26cpu-Pbt FirmwareAll versions
MitsubishielectricQ02phcpu FirmwareAll versions
MitsubishielectricQ06phcpu FirmwareAll versions
MitsubishielectricQ12dccpu-V FirmwareAll versions
MitsubishielectricQ12phcpu FirmwareAll versions
MitsubishielectricQ12prhcpu FirmwareAll versions
MitsubishielectricQ172dscpu FirmwareAll versions
MitsubishielectricQ173dscpu FirmwareAll versions
MitsubishielectricQ173nccpu FirmwareAll versions
MitsubishielectricQ24dhccpu-Ls FirmwareAll versions
MitsubishielectricQ24dhccpu-V FirmwareAll versions
MitsubishielectricQ24dhccpu-Vg2 FirmwareAll versions
MitsubishielectricQ25phcpu FirmwareAll versions
MitsubishielectricQ25prhcpu FirmwareAll versions
MitsubishielectricQ26dhccpu-Ls FirmwareAll versions
MitsubishielectricR00cpu FirmwareAll versions
MitsubishielectricR01cpu FirmwareAll versions
MitsubishielectricR02cpu FirmwareAll versions
MitsubishielectricR04cpu FirmwareAll versions
MitsubishielectricR04encpu FirmwareAll versions
MitsubishielectricR08cpu FirmwareAll versions
MitsubishielectricR08encpu FirmwareAll versions
MitsubishielectricR120cpu FirmwareAll versions
MitsubishielectricR120encpu FirmwareAll versions
MitsubishielectricR16cpu FirmwareAll versions
MitsubishielectricR16encpu FirmwareAll versions
MitsubishielectricR32cpu FirmwareAll versions
MitsubishielectricR32encpu FirmwareAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-5527?
When MELSOFT transmission port (UDP/IP) of Mitsubishi Electric MELSEC iQ-R series (all versions), MELSEC iQ-F series (all versions), MELSEC Q series (all versions), MELSEC L series (all versions), and MELSEC F series (all versions) receives massive amount of data via unspecified vectors, resource consumption occurs and the port does not process the data properly. As a result, it may fall into a denial-of-service (DoS) condition. The vendor states this vulnerability only affects Ethernet communication functions.
How severe is CVE-2020-5527?
CVE-2020-5527 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.
How do I fix CVE-2020-5527?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-5527?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST