Upstream information
Description
A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS Client Subnet (ECS). Unbound is also vulnerable when compiled with ECS support, i.e., '--enable-subnet', AND configured to send ECS information along with queries to upstream name servers, i.e., at least one of the 'send-client-subnet', 'client-subnet-zone' or 'client-subnet-always-forward' options is used. Resolvers supporting ECS need to segregate outgoing queries to accommodate for different outgoing ECS information. This re-opens up resolvers to a birthday paradox attack (Rebirthday Attack) that tries to match the DNS transaction ID in order to cache non-ECS poisonous replies.SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having important severity.
SUSE | |
---|---|
Base Score | 7.5 |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Attack Vector | Network |
Attack Complexity | Low |
Privileges Required | None |
User Interaction | None |
Scope | Unchanged |
Confidentiality Impact | None |
Integrity Impact | None |
Availability Impact | High |
CVSSv3 Version | 3.1 |
CNA (NLnet Labs) | SUSE | |
---|---|---|
Base Score | 8.7 | 8.7 |
Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:U/V:C/RE:X/U:X | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:U/V:C/RE:X/U:X |
Attack Vector | Network | Network |
Attack Complexity | Low | Low |
Attack Requirements | None | None |
Privileges Required | None | None |
User Interaction | None | None |
Vulnerable System Confidentiality Impact | None | None |
Vulnerable System Integrity Impact | High | High |
Vulnerable System Availability Impact | None | None |
Subsequent System Confidentiality Impact | None | None |
Subsequent System Integrity Impact | None | None |
Subsequent System Availability Impact | None | None |
CVSSv4 Version | 4.0 | 4.0 |
SUSE Security Advisories:
- RHSA-2025:11849, published Tue Jul 29 15:06:52 UTC 2025
- RHSA-2025:11884, published Tue Jul 29 15:06:53 UTC 2025
List of released packages
Product(s) | Fixed package version(s) | References |
---|---|---|
SUSE Liberty Linux 8 |
| Patchnames: RHSA-2025:11884 |
SUSE Liberty Linux 9 |
| Patchnames: RHSA-2025:11849 |
openSUSE Tumbleweed |
| Patchnames: openSUSE-Tumbleweed-2025-15435 |
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 | unbound | Not affected |
SUSE Linux Enterprise Desktop 15 SP7 | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP6 | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP7 | unbound | Not affected |
SUSE Linux Enterprise Micro 5.5 | unbound | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 SP6 | unbound | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 SP7 | unbound | Not affected |
SUSE Linux Enterprise Module for Package Hub 15 SP5 | unbound | Not affected |
SUSE Linux Enterprise Module for Package Hub 15 SP6 | unbound | Not affected |
SUSE Linux Enterprise Module for Package Hub 15 SP7 | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP6 | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP7 | unbound | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP6 | unbound | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP7 | unbound | Not affected |
SUSE Linux Micro 6.0 | unbound | Not affected |
SUSE Linux Micro 6.1 | unbound | Not affected |
openSUSE Leap 15.6 | unbound | Not affected |
Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
SUSE Linux Enterprise High Performance Computing 15 SP3 | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP4 | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP5 | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | unbound | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 SP3 | unbound | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 SP4 | unbound | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 SP5 | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP3 | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP3-LTSS | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP4 | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP4-LTSS | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP5 | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP5-LTSS | unbound | Not affected |
SUSE Manager Proxy 4.3 | unbound | Not affected |
SUSE Manager Proxy LTS 4.3 | unbound | Not affected |
SUSE Manager Retail Branch Server 4.3 | unbound | Not affected |
SUSE Manager Retail Branch Server LTS 4.3 | unbound | Not affected |
SUSE Manager Server 4.3 | unbound | Not affected |
SUSE Manager Server LTS 4.3 | unbound | Not affected |
Products past their end of life and not receiving proactive updates anymore. | ||
SUSE CaaS Platform 4.0 | unbound | Not affected |
SUSE Enterprise Storage 6 | unbound | Not affected |
SUSE Enterprise Storage 7 | unbound | Not affected |
SUSE Enterprise Storage 7.1 | unbound | Not affected |
SUSE Linux Enterprise Desktop 15 | unbound | Not affected |
SUSE Linux Enterprise Desktop 15 SP1 | unbound | Not affected |
SUSE Linux Enterprise Desktop 15 SP2 | unbound | Not affected |
SUSE Linux Enterprise Desktop 15 SP3 | unbound | Not affected |
SUSE Linux Enterprise Desktop 15 SP4 | unbound | Not affected |
SUSE Linux Enterprise Desktop 15 SP5 | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP1 | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP2 | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15-ESPOS | unbound | Not affected |
SUSE Linux Enterprise High Performance Computing 15-LTSS | unbound | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 | unbound | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 SP1 | unbound | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 SP2 | unbound | Not affected |
SUSE Linux Enterprise Module for Package Hub 15 SP3 | unbound | Not affected |
SUSE Linux Enterprise Module for Package Hub 15 SP4 | unbound | Not affected |
SUSE Linux Enterprise Real Time 15 SP2 | unbound | Not affected |
SUSE Linux Enterprise Real Time 15 SP3 | unbound | Not affected |
SUSE Linux Enterprise Real Time 15 SP4 | unbound | Not affected |
SUSE Linux Enterprise Server 15 | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP1 | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP1-BCL | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP1-LTSS | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP2 | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP2-BCL | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP2-LTSS | unbound | Not affected |
SUSE Linux Enterprise Server 15 SP3-BCL | unbound | Not affected |
SUSE Linux Enterprise Server 15-LTSS | unbound | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 | unbound | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP1 | unbound | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP2 | unbound | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP3 | unbound | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP4 | unbound | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP5 | unbound | Not affected |
SUSE Manager Proxy 4.0 | unbound | Not affected |
SUSE Manager Proxy 4.1 | unbound | Not affected |
SUSE Manager Proxy 4.2 | unbound | Not affected |
SUSE Manager Retail Branch Server 4.0 | unbound | Not affected |
SUSE Manager Retail Branch Server 4.1 | unbound | Not affected |
SUSE Manager Retail Branch Server 4.2 | unbound | Not affected |
SUSE Manager Server 4.0 | unbound | Not affected |
SUSE Manager Server 4.1 | unbound | Not affected |
SUSE Manager Server 4.2 | unbound | Not affected |
openSUSE Leap 15.3 | unbound | Not affected |
openSUSE Leap 15.4 | unbound | Not affected |
openSUSE Leap 15.5 | unbound | Not affected |
SUSE Timeline for this CVE
CVE page created: Wed Jul 16 18:02:01 2025CVE page last modified: Wed Aug 13 01:25:16 2025