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.
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.
No analysis available yet.
Remediation
No remediation available yet.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2025-15818 | 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. |
Ubuntu USN |
USN-8037-1 | DNSdist vulnerabilities |
References
History
Tue, 20 May 2025 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Tue, 20 May 2025 11:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Denial of service via crafted TCP exchange | |
| Weaknesses | CWE-674 | |
| References |
| |
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: OX
Published:
Updated: 2025-05-20T13:16:34.707Z
Reserved: 2025-03-18T08:39:46.884Z
Link: CVE-2025-30193
Updated: 2025-05-20T13:16:25.553Z
Status : Awaiting Analysis
Published: 2025-05-20T12:15:19.697
Modified: 2025-05-21T20:25:16.407
Link: CVE-2025-30193
No data.
OpenCVE Enrichment
Updated: 2025-07-12T15:26:06Z
Weaknesses
EUVD
Ubuntu USN