#VU7650 Out-of-bounds write in E-Designer - CVE-2017-9634

Vulnerability identifier: #VU7650

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-9634

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
E-Designer
Client/Desktop applications / File managers, FTP clients

Vendor: Mitsubishi Electric

Description
The vulnerability allows a remote attacker to execute arbitrary code.

The weakness exists due to out-of-bounds write in two code sections. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Mitsubishi recommends the following actions to mitigate these vulnerabilities:

• Use E-Designer in a safe, firewalled network.
• Replace E-Designer HMIs with interfaces built with Mitsubishi’s new product, GT Works. E-Designer has been discontinued.

Vulnerable software versions

E-Designer: 7.52 Build 344

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External links
https://ics-cert.us-cert.gov/advisories/ICSA-17-213-01

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.