Upstream information
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.
SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having important severity.
| CNA (Open-Xchange) | SUSE | |
|---|---|---|
| Base Score | 7.5 | 7.5 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | None |
| Integrity Impact | None | None |
| Availability Impact | High | High |
| CVSSv3 Version | 3.1 | 3.1 |
| SUSE | |
|---|---|
| Base Score | 8.7 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Attack Requirements | None |
| Privileges Required | None |
| User Interaction | None |
| Vulnerable System Confidentiality Impact | None |
| Vulnerable System Integrity Impact | None |
| Vulnerable System Availability Impact | High |
| Subsequent System Confidentiality Impact | None |
| Subsequent System Integrity Impact | None |
| Subsequent System Availability Impact | None |
| CVSSv4 Version | 4.0 |
SUSE Security Advisories:
- SUSE-SU-2025:01743-1, published 2025-05-29T11:44:30Z
- SUSE-SU-2025:01745-1, published 2025-05-29T12:22:10Z
- SUSE-SU-2025:01792-1, published 2025-06-02T07:38:54Z
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| SUSE Enterprise Storage 7.1 |
| Patchnames: SUSE-Storage-7.1-2025-1792 |
| SUSE Linux Enterprise Desktop 15 SP6 SUSE Linux Enterprise High Performance Computing 15 SP6 SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Server 15 SP6 SUSE Linux Enterprise Server for SAP Applications 15 SP6 |
| Patchnames: SUSE-SLE-Module-Basesystem-15-SP6-2025-1745 |
| SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 |
| Patchnames: SUSE-SLE-Module-Basesystem-15-SP7-2025-1743 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP4-ESPOS-2025-1745 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP4-LTSS-2025-1745 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP5-ESPOS-2025-1745 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP5-LTSS-2025-1745 |
| SUSE Linux Enterprise Server 15 SP3-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP3-LTSS-2025-1792 |
| SUSE Linux Enterprise Server 15 SP4-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP4-LTSS-2025-1745 |
| SUSE Linux Enterprise Server 15 SP5-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP5-LTSS-2025-1745 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 |
| Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP4-2025-1745 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 |
| Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP5-2025-1745 |
| SUSE Manager Proxy 4.3 |
| Patchnames: SUSE-SLE-Product-SUSE-Manager-Proxy-4.3-2025-1745 |
| SUSE Manager Retail Branch Server 4.3 |
| Patchnames: SUSE-SLE-Product-SUSE-Manager-Retail-Branch-Server-4.3-2025-1745 |
| SUSE Manager Server 4.3 |
| Patchnames: SUSE-SLE-Product-SUSE-Manager-Server-4.3-2025-1745 |
| openSUSE Leap 15.6 |
| Patchnames: openSUSE-SLE-15.6-2025-1745 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP6 | dnsdist | Released |
| SUSE Linux Enterprise Desktop 15 SP7 | dnsdist | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | dnsdist | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | dnsdist | Released |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | dnsdist | Released |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | dnsdist | Released |
| SUSE Linux Enterprise Server 15 SP6 | dnsdist | Released |
| SUSE Linux Enterprise Server 15 SP7 | dnsdist | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | dnsdist | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | dnsdist | Released |
| SUSE Manager Proxy 4.3 | dnsdist | Released |
| SUSE Manager Retail Branch Server 4.3 | dnsdist | Released |
| SUSE Manager Server 4.3 | dnsdist | Released |
| openSUSE Leap 15.6 | dnsdist | Released |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | dnsdist | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | dnsdist | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | dnsdist | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | dnsdist | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | dnsdist | Released |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | dnsdist | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | dnsdist | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | dnsdist | Released |
| SUSE Linux Enterprise Server 15 SP4 | dnsdist | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | dnsdist | Released |
| SUSE Linux Enterprise Server 15 SP5 | dnsdist | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | dnsdist | Released |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE CaaS Platform 4.0 | dnsdist | Affected |
| SUSE Enterprise Storage 7.1 | dnsdist | Released |
| SUSE Linux Enterprise Desktop 15 SP4 | dnsdist | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | dnsdist | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | dnsdist | Released |
| SUSE Linux Enterprise Real Time 15 SP4 | dnsdist | Affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | dnsdist | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | dnsdist | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | dnsdist | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | dnsdist | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | dnsdist | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | dnsdist | Released |
| openSUSE Leap 15.4 | dnsdist | Released |
| openSUSE Leap 15.5 | dnsdist | Affected |
SUSE Timeline for this CVE
CVE page created: Tue May 20 16:00:12 2025CVE page last modified: Mon Jun 2 17:18:47 2025