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.
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Affected Vendors & Products
References
History
Tue, 20 May 2025 14:15:00 +0000
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ssvc
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Tue, 20 May 2025 11:30:00 +0000
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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 |
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Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: OX
Published: 2025-05-20T11:17:17.378Z
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

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