Upstream information
Description
In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-protocol-port' interface with 'answer-cookie: yes', the RFC 9018 server-cookie SipHash is computed over the proxy's wire address instead of the PROXYv2-declared client. One server cookie obtained through a given proxy node therefore validates for every PROXYv2-declared source behind that node. On a UDP+proxy-protocol front, an off-path attacker can harvest one cookie with a single legitimate query, then replay it under any spoofed source and pass DNS Cookie checks that were deployed to defeat this in the first place.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (NLnet Labs) | SUSE |
|---|---|---|
| Base Score | 3.7 | 3.7 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
| Attack Vector | Network | Network |
| Attack Complexity | High | High |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | Low |
| Integrity Impact | Low | None |
| Availability Impact | None | None |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | SUSE |
|---|---|
| Base Score | 6.3 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Attack Requirements | Present |
| Privileges Required | None |
| User Interaction | None |
| Vulnerable System Confidentiality Impact | Low |
| Vulnerable System Integrity Impact | None |
| Vulnerable System Availability Impact | None |
| Subsequent System Confidentiality Impact | None |
| Subsequent System Integrity Impact | None |
| Subsequent System Availability Impact | None |
| CVSSv4 Version | 4.0 |
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| openSUSE Tumbleweed |
| Patchnames: openSUSE-Tumbleweed-2026-11380 |
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Please note that this evaluation state might be work in progress, incomplete or outdated.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 SP7 | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | unbound | Affected |
| SUSE Linux Enterprise Micro 5.5 | unbound | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | unbound | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP7 | unbound | Affected |
| SUSE Linux Enterprise Server 16.0 | unbound | In progress |
| SUSE Linux Enterprise Server 16.1 | unbound | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | unbound | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | unbound | In progress |
| SUSE Linux Enterprise Server for SAP applications 16.1 | unbound | Released |
| SUSE Linux Micro 6.0 | unbound | Affected |
| SUSE Linux Micro 6.1 | unbound | Affected |
| SUSE Linux Micro 6.2 | unbound | In progress |
| openSUSE Leap 16.0 | unbound | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | unbound | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | unbound | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | unbound | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP4 | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP5 | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP6 | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | unbound | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | unbound | Affected |
| SUSE Manager Proxy 4.3 | unbound | Affected |
| SUSE Manager Proxy LTS 4.3 | unbound | Affected |
| SUSE Manager Retail Branch Server 4.3 | unbound | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | unbound | Affected |
| SUSE Manager Server 4.3 | unbound | Affected |
| SUSE Manager Server LTS 4.3 | unbound | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE CaaS Platform 4.0 | unbound | Affected |
| SUSE Enterprise Storage 6 | unbound | Affected |
| SUSE Enterprise Storage 7 | unbound | Affected |
| SUSE Enterprise Storage 7.1 | unbound | Affected |
| SUSE Linux Enterprise Desktop 15 SP1 | unbound | Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | unbound | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | unbound | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | unbound | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | unbound | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | unbound | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | unbound | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | unbound | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | unbound | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | unbound | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP3 | unbound | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP4 | unbound | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | unbound | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | unbound | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | unbound | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | unbound | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP1 | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP2 | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP3 | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | unbound | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | unbound | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | unbound | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | unbound | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | unbound | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | unbound | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | unbound | Affected |
| SUSE Manager Proxy 4.0 | unbound | Affected |
| SUSE Manager Proxy 4.1 | unbound | Affected |
| SUSE Manager Proxy 4.2 | unbound | Affected |
| SUSE Manager Retail Branch Server 4.0 | unbound | Affected |
| SUSE Manager Retail Branch Server 4.1 | unbound | Affected |
| SUSE Manager Retail Branch Server 4.2 | unbound | Affected |
| SUSE Manager Server 4.0 | unbound | Affected |
| SUSE Manager Server 4.1 | unbound | Affected |
| SUSE Manager Server 4.2 | unbound | Affected |
| openSUSE Leap 15.3 | unbound | Affected |
| openSUSE Leap 15.4 | unbound | Affected |
| openSUSE Leap 15.5 | unbound | Affected |
| openSUSE Leap 15.6 | unbound | Affected |
SUSE Timeline for this CVE
CVE page created: Thu Jul 23 11:44:42 2026CVE page last modified: Tue Aug 4 16:35:54 2026