Improper handling of DNS over TCP in Simple DNS Plus v9 allows a remote attacker with querying access to the DNS server to cause the server to return request payloads from other clients. This happens when the TCP length prefix is malformed (len differs from actual packet len), and due to a concurrency/buffering issue, even when the lengths match. A length prefix that is smaller than the actual packet size increases information leakage. In summary, this vulnerability allows an attacker to see DNS queries of other clients.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 24 Oct 2025 17:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-350
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 24 Oct 2025 14:45:00 +0000

Type Values Removed Values Added
Description Improper handling of DNS over TCP in Simple DNS Plus v9 allows a remote attacker with querying access to the DNS server to cause the server to return request payloads from other clients. This happens when the TCP length prefix is malformed (len differs from actual packet len), and due to a concurrency/buffering issue, even when the lengths match. A length prefix that is smaller than the actual packet size increases information leakage. In summary, this vulnerability allows an attacker to see DNS queries of other clients.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-10-24T16:40:04.156Z

Reserved: 2025-09-26T00:00:00.000Z

Link: CVE-2025-61430

cve-icon Vulnrichment

Updated: 2025-10-24T16:39:51.218Z

cve-icon NVD

Status : Received

Published: 2025-10-24T15:15:40.703

Modified: 2025-10-24T17:15:42.900

Link: CVE-2025-61430

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.