Mitsubishi Electric MELSEC-Q/MELSEC-L FTP Service resource consumption

Summaryinfo

A vulnerability marked as problematic has been reported in Mitsubishi Electric MELSEC-Q and MELSEC-L. Affected is an unknown function of the component FTP Service. Performing a manipulation results in resource consumption. This vulnerability is known as CVE-2019-13555. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability classified as problematic has been found in Mitsubishi Electric MELSEC-Q and MELSEC-L (the affected version is unknown). This affects an unknown code of the component FTP Service. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

In Mitsubishi Electric MELSEC-Q Series Q03/04/06/13/26UDVCPU: serial number 21081 and prior, Q04/06/13/26UDPVCPU: serial number 21081 and prior, and Q03UDECPU, Q04/06/10/13/20/26/50/100UDEHCPU: serial number 21081 and prior, MELSEC-L Series L02/06/26CPU, L26CPU-BT: serial number 21101 and prior, L02/06/26CPU-P, L26CPU-PBT: serial number 21101 and prior, and L02/06/26CPU-CM, L26CPU-BT-CM: serial number 21101 and prior, a remote attacker can cause the FTP service to enter a denial-of-service condition dependent on the timing at which a remote attacker connects to the FTP server on the above CPU modules.

The weakness was published 11/13/2019. This vulnerability is uniquely identified as CVE-2019-13555 since 07/11/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Mitsubishi Electric

Name

• MELSEC-L
• MELSEC-Q

License

• commercial

CPE 2.3info

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CPE 2.2info

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