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Vulnerability details: VCID-y7uc-njvq-bbcj
Vulnerability ID VCID-y7uc-njvq-bbcj
Aliases CVE-2025-30193
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 3.8
Risk 1.9
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-674 Uncontrolled Recursion
System Score Found at
epss 0.00013 https://api.first.org/data/v1/epss?cve=CVE-2025-30193
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2025-30193
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2025-30193
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2025-30193
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2025-30193
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2025-30193
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2025-30193
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2025-30193
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2025-30193
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2025-30193
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2025-30193
cvssv3.1 7.5 https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-03.html
ssvc Track https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-03.html
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2025-30193
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-30193
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1106207 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1106207
CVE-2025-30193 https://nvd.nist.gov/vuln/detail/CVE-2025-30193
powerdns-advisory-for-dnsdist-2025-03.html https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-03.html
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-03.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-05-20T13:16:06Z/ Found at https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-03.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.01332
EPSS Score 0.00013
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T13:39:55.086680+00:00 Debian Importer Import https://security-tracker.debian.org/tracker/data/json 36.1.3