CVE-2018-7502 Privilege escalation in Beckhoff TwinCAT PLC products

What is CVE-2018-7502?

CVE-2018-7502 is a high-severity vulnerability in ICS-CERT Beckhoff TwinCAT PLC products, published on 23 Mar 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Kernel drivers in Beckhoff TwinCAT 3.1 Build 4022.4, TwinCAT 2.11 R3 2259, and TwinCAT 3.1 lack proper validation of user-supplied pointer values. An attacker who is able to execute code on the target may be able to exploit this vulnerability to obtain SYSTEM privileges.

Weakness: CWE-20, CWE-822

Which versions are affected by CVE-2018-7502?

It affects 2 products.

Products include Beckhoff Twincat, Beckhoff Twincat C\+\+.

How do I fix CVE-2018-7502?

No fix has been published for CVE-2018-7502 yet. Limit exposure of the affected software until one is available.

Is CVE-2018-7502 being exploited?

There is no known exploitation of CVE-2018-7502 in the wild and no public exploit code.

Other vulnerabilities in ICS-CERT Beckhoff TwinCAT PLC products

• CVE-2019-16871 Auth bypass in n/a Critical 9.8
• CVE-2017-16726 Weak cryptography in Beckhoff TwinCAT Critical 9.1
• CVE-2019-5637 Beckhoff TwinCAT Profinet Driver Divide-by-Zero Denial of Service High 7.5
• CVE-2017-16718 Weak cryptography in Beckhoff TwinCAT Medium 5.9
• CVE-2020-12494 Beckhoff: Etherleak in TwinCAT RT network driver Medium 5.3

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CVE-2017-14776, CVE-2017-14777, CVE-2017-14778, CVE-2017-14779, CVE-2017-14780, CVE-2017-14781 and 14 more.