CVE-2025-30193 — Uncontrolled Recursion in Dnsdist
Severity
7.5HIGHNVD
OSV3.7
EPSS
0.2%
top 63.81%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMay 20
Latest updateFeb 12
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 setMaxTCPQueriesPer…
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6
Affected Packages2 packages
🔴Vulnerability Details
4OSV▶
CVE-2025-30193: In some circumstances, when DNSdist is configured to allow an unlimited number of queries on a single, incoming TCP connection from a client, an attac↗2025-05-20
GHSA▶
GHSA-4q3h-v92p-gchj: In some circumstances, when DNSdist is configured to allow an unlimited number of queries on a single, incoming TCP connection from a client, an attac↗2025-05-20