From 9af71e1e39e59962bb24f1a8ad8cfdede7acf4cd Mon Sep 17 00:00:00 2001 From: Remi Gacogne Date: Tue, 20 May 2025 09:42:46 +0200 Subject: [PATCH] dnsdist: Add security advisory 2025-03 --- .../powerdns-advisory-for-dnsdist-2025-03.rst | 28 +++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 pdns/dnsdistdist/docs/security-advisories/powerdns-advisory-for-dnsdist-2025-03.rst diff --git a/pdns/dnsdistdist/docs/security-advisories/powerdns-advisory-for-dnsdist-2025-03.rst b/pdns/dnsdistdist/docs/security-advisories/powerdns-advisory-for-dnsdist-2025-03.rst new file mode 100644 index 0000000000..e1a644a994 --- /dev/null +++ b/pdns/dnsdistdist/docs/security-advisories/powerdns-advisory-for-dnsdist-2025-03.rst @@ -0,0 +1,28 @@ +PowerDNS Security Advisory 2025-03 for DNSdist: Denial of service via crafted TCP exchange +========================================================================================== + +- CVE: CVE-2025-30193 +- Date: 2025-05-20T13:00:00+02:00 +- Discovery date: 2025-05-13T11:13:00+02:00 +- Affects: PowerDNS DNSdist up to 1.9.9 +- Not affected: PowerDNS DNSdist 1.9.10 +- Severity: High +- Impact: Denial of service +- Exploit: This problem can be triggered by an attacker crafting a TCP exchange +- Risk of system compromise: None +- Solution: Upgrade to patched version or restrict the maximum number of queries on a single incoming TCP connection +- CWE: CWE-674 +- CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H +- Last affected: 1.9.9 +- First fixed: 1.9.10 +- Internal ID: 299 + +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. + +`CVSS Score: 7.5 `__ + +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 :func:`setMaxTCPQueriesPerConnection` setting. + +We would like to thank Renaud Allard for bringing this issue to our attention. \ No newline at end of file -- 2.47.2