Upstream information
Description
Net::DNS versions before 1.57 for Perl allow memory exhaustion via unbounded recursion in sig_data when re-encoding a message with a misplaced TSIG record.sig_data signs a message by re-encoding it, and removes TSIG records only from the additional section. A TSIG decoded into the answer or authority section survives that step and is signed again, so encoding re-enters sig_data with no termination condition. Decoding does not reject such a message: a TSIG that is not the last record on the wire raises "misplaced or corrupt TSIG", but the error is caught, reported as a warning, and the record is left in the packet. RFC 8945 section 5.2 requires the message to be dropped.
The recursion is reached only when the decoded TSIG carries an empty MAC, since a MAC recovered from the wire short-circuits the signing step. It is reached only from code that re-encodes a message it decoded, such as a forwarder or a proxy. A decoded message that is never re-encoded is unaffected. Message direction does not matter: a query reaches the same path as a response.
Each cycle re-encodes the whole message, so fewer than 100 bytes on the wire exhaust available memory and terminate the process.
SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | SUSE |
|---|---|
| Base Score | 5.3 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Low |
| CVSSv3 Version | 3.1 |
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Please note that this evaluation state might be work in progress, incomplete or outdated.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 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 12 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP7 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | perl-Net-DNS | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 12 SP5 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP5 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP4 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP5 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP6 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | perl-Net-DNS | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| HPE Helion OpenStack 8 | perl-Net-DNS | Affected |
| SUSE CaaS Platform 4.0 | perl-Net-DNS | Affected |
| SUSE Enterprise Storage 6 | perl-Net-DNS | Affected |
| SUSE Enterprise Storage 7 | perl-Net-DNS | Affected |
| SUSE Enterprise Storage 7.1 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Desktop 12 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Desktop 12 SP1 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Desktop 12 SP2 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Desktop 12 SP3 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Desktop 12 SP4 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Desktop 15 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Desktop 15 SP1 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP1 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP2 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP3 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP4 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP1 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP1-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP2 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP2-BCL | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP2-ESPOS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP2-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP3 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP3-BCL | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP3-ESPOS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP3-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP4 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP4-ESPOS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12 SP4-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 12-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP1 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP2 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP3 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server 15-LTSS | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server for Raspberry Pi 12 SP2 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP1 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | perl-Net-DNS | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | perl-Net-DNS | Affected |
| SUSE Manager Proxy 4.0 | perl-Net-DNS | Affected |
| SUSE Manager Proxy 4.1 | perl-Net-DNS | Affected |
| SUSE Manager Proxy 4.2 | perl-Net-DNS | Affected |
| SUSE Manager Proxy 4.3 | perl-Net-DNS | Affected |
| SUSE Manager Proxy LTS 4.3 | perl-Net-DNS | Affected |
| SUSE Manager Retail Branch Server 4.0 | perl-Net-DNS | Affected |
| SUSE Manager Retail Branch Server 4.1 | perl-Net-DNS | Affected |
| SUSE Manager Retail Branch Server 4.2 | perl-Net-DNS | Affected |
| SUSE Manager Retail Branch Server 4.3 | perl-Net-DNS | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | perl-Net-DNS | Affected |
| SUSE Manager Server 4.0 | perl-Net-DNS | Affected |
| SUSE Manager Server 4.1 | perl-Net-DNS | Affected |
| SUSE Manager Server 4.2 | perl-Net-DNS | Affected |
| SUSE Manager Server 4.3 | perl-Net-DNS | Affected |
| SUSE Manager Server LTS 4.3 | perl-Net-DNS | Affected |
| SUSE OpenStack Cloud 7 | perl-Net-DNS | Affected |
| SUSE OpenStack Cloud 8 | perl-Net-DNS | Affected |
| SUSE OpenStack Cloud 9 | perl-Net-DNS | Affected |
| SUSE OpenStack Cloud Crowbar 8 | perl-Net-DNS | Affected |
| SUSE OpenStack Cloud Crowbar 9 | perl-Net-DNS | Affected |
| openSUSE Leap 15.3 | perl-Net-DNS | Affected |
| openSUSE Leap 15.4 | perl-Net-DNS | Affected |
| openSUSE Leap 15.5 | perl-Net-DNS | Affected |
| openSUSE Leap 15.6 | perl-Net-DNS | Affected |
SUSE Timeline for this CVE
CVE page created: Wed Sep 2 12:17:59 2026CVE page last modified: Wed Sep 2 12:17:59 2026