CVE-2019-6520 Missing authorization in Moxa IKS, EDS

What is CVE-2019-6520?

CVE-2019-6520 is a high-severity missing authorization vulnerability in ICS-CERT Moxa IKS, EDS, published on 5 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Moxa IKS and EDS does not properly check authority on server side, which results in a read-only user being able to perform arbitrary configuration changes.

Weakness: CWE-284

Which versions are affected by CVE-2019-6520?

It affects 4 products.

Products include Moxa Eds-405a Firmware, Moxa Eds-408a Firmware, Moxa Eds-510a Firmware, Moxa Iks-G6824a Firmware.

How do I fix CVE-2019-6520?

No fix has been published for CVE-2019-6520 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2019-6520 being exploited?

There is no known exploitation of CVE-2019-6520 in the wild and no public exploit code.

Other vulnerabilities in ICS-CERT Moxa IKS, EDS

• CVE-2019-6526 Information disclosure in IKS, EDS Critical 9.8
• CVE-2019-6524 Auth bypass in Moxa IKS, EDS Critical 9.8
• CVE-2019-6557 Memory corruption in Moxa IKS, EDS Critical 9.8
• CVE-2019-6563 Weak cryptography in Moxa IKS, EDS Critical 9.8
• CVE-2019-6522 Information disclosure in Moxa IKS, EDS Critical 9.1

Sources

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

Also known as GHSA-5m99-qg5r-pvv8.