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CVE-2025-30193

Denial of service via crafted TCP exchange

Published: May 20, 2025Updated: May 21, 2025 Sources: CVE List NVD BDUCWE-674
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.6%
Top 57.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-674

Affected Products

DNSdistPowerDNS
On-prem
Networking Infrastructure / dns-dhcp-ntp
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Suse Linux Enterprise ServerNovell Inc.
On-premOS
Operating Systems / linux-distro
SUSE Manager Retail Branch ServerNovell Inc.
On-prem
Operating Systems / linux-distro
powerdnsoss-projectDKNetworking Infrastructureaka powerdns recursor, powerdns authoritative, dnsdist
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
ооо «ред софт»commercialRUOperating Systemsaka red soft
novell inc.commercialUSOperating Systems
and 10 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-03.html
dnsdist.org
https://nvd.nist.gov/vuln/detail/CVE-2025-30193
nvd.nist.gov
https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-03.html
dnsdist.org
and 6 more references View all →

Timeline

Published
May 20, 2025
Last Updated
May 21, 2025

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