CVE-2021-21928 SQL injection in Advantech

What is CVE-2021-21928?

CVE-2021-21928 is a high-severity SQL injection vulnerability in Advantech, published on 22 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A specially-crafted HTTP request can lead to SQL injection. An attacker can make authenticated HTTP requests at ‘mac_filter’ parameter to trigger this vulnerability. This can be done as any authenticated user or through cross-site request forgery.

Weakness: CWE-89

Which versions are affected by CVE-2021-21928?

It affects 1 product.

Products include Advantech R-Seenet.

How do I fix CVE-2021-21928?

No fix has been published for CVE-2021-21928 yet. Limit exposure of the affected software until one is available.

Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.

Is CVE-2021-21928 being exploited?

There is no known exploitation of CVE-2021-21928 in the wild and no public exploit code.

Other vulnerabilities in Advantech

• CVE-2023-5642 Advantech R-SeeNet Unauthenticated Read/Write Critical 9.8
• CVE-2023-2611 Advantech R-SeeNet Use of Hard-coded Credentials Critical 9.8
• CVE-2022-3385 Memory corruption in R-SeeNet Critical 9.8
• CVE-2022-3386 Memory corruption in R-SeeNet Critical 9.8
• CVE-2021-21805 Command injection in Advantech Critical 9.8

Sources

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

Also known as GHSA-hx3h-9m35-6xcm.