CVE-2021-34442 Windows DNS Server Remote Code Execution Vulnerability

What is CVE-2021-34442?

CVE-2021-34442 is a high-severity memory corruption vulnerability in Microsoft Windows Server 2008, published on 16 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Windows DNS Server Remote Code Execution Vulnerability

Which versions are affected by CVE-2021-34442?

It affects 4 products.

Products include Microsoft Windows Server 2008, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019.

How do I fix CVE-2021-34442?

No fix has been published for CVE-2021-34442 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-34442 being exploited?

There is no known exploitation of CVE-2021-34442 in the wild and no public exploit code.

Other vulnerabilities in Microsoft Windows Server 2008

• CVE-2020-1350 Microsoft Windows DNS Server Remote Code Execution Exploited Critical 10.0
• CVE-2020-1040 Microsoft Hyper-V RemoteFX vGPU Remote Code Execution Exploited Critical 9.0
• CVE-2011-1966 Memory corruption in n/a Critical 10.0
• CVE-2010-0239 Memory corruption in n/a Critical 10.0
• CVE-2010-0240 Code injection in n/a Critical 10.0

All Microsoft Windows Server 2008 vulnerabilities

Sources

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

Also known as GHSA-6p5f-qv8v-hp6j.