CVE-2020-35609 Denial of service in n/a

What is CVE-2020-35609?

CVE-2020-35609 is a medium-severity denial of service vulnerability in n/a, published on 22 Dec 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A denial-of-service vulnerability exists in the asynchronous ioctl functionality of Microsoft Azure Sphere 20.05. A sequence of specially crafted ioctl calls can cause a denial of service. An attacker can write shellcode to trigger this vulnerability.

Weakness: CWE-835

Which versions are affected by CVE-2020-35609?

It affects 1 product.

Products include Microsoft Azure Sphere.

How do I fix CVE-2020-35609?

No fix has been published for CVE-2020-35609 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-35609 being exploited?

There is no known exploitation of CVE-2020-35609 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2021-27080 Azure Sphere Unsigned Code Execution Vulnerability Critical 9.3
• CVE-2021-28460 Azure Sphere Unsigned Code Execution Vulnerability High 8.1
• CVE-2020-16970 Azure Sphere Unsigned Code Execution Vulnerability High 8.1
• CVE-2020-35608 Code injection in n/a High 7.8
• CVE-2021-26429 Azure Sphere Elevation of Privilege Vulnerability High 7.7

Sources

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

Also known as GHSA-8xr7-5cxh-6x35.