Security News > 2020 > December > Microsoft issues guidance for DNS cache poisoning vulnerability
Microsoft issued guidance on how to mitigate a DNS cache poisoning vulnerability reported by security researchers from the University of California and Tsinghua University.
Successfully exploiting the vulnerability could allow attackers to use modified DNS records to redirect a target to a malicious website under their control as part of DNS spoofing attacks.
The addressing spoofing vulnerability - tracked as CVE-2020-25705 and nicknamed SAD DNS - exists in the Windows DNS Resolver software component that comes bundled with the Windows Transmission Control Protocol/Internet Protocol stack.
"Microsoft is aware of a vulnerability involving DNS cache poisoning caused by IP fragmentation that affects Windows DNS Resolver," the company explains in a security advisory published as part of this month's Patch Tuesday.
"An attacker who successfully exploited this vulnerability could spoof the DNS packet which can be cached by the DNS Forwarder or the DNS Resolver."
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Related Vulnerability
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2020-11-17 | CVE-2020-25705 | Use of Insufficiently Random Values vulnerability in multiple products A flaw in ICMP packets in the Linux kernel may allow an attacker to quickly scan open UDP ports. | 7.4 |