CyberRota Analysis
This is a high severity vulnerability with a CVSS score of 7.5. It affects Exchange. It may lead to a denial-of-service condition.
CVE
CVE-2025-30193
Severity
HIGH
CVSS
7.5
EPSS
0.59%
Exchange
Original NVD Description
In some circumstances, when DNSdist is configured to allow an unlimited number of queries on a single, incoming TCP connection from a client, an attacker can cause a denial of service by crafting a TCP exchange that triggers an exhaustion of the stack and a crash of DNSdist, causing a denial of service. The remedy is: upgrade to the patched 1.9.10 version. A workaround is to restrict the maximum number of queries on incoming TCP connections to a safe value, like 50, via the setMaxTCPQueriesPerConnection setting. We would like to thank Renaud Allard for bringing this issue to our attention.