Upstream information
Description
Botan is a C++ cryptography library. Prior to 3.13.0, Botan's X.509 Distinguished Name decoder flattens the Attribute-Value Assertions in each Relative Distinguished Name and loses multi-value RDN grouping before DN name-constraint enforcement. An attacker controlling a name-constrained intermediate CA can issue a certificate with a multi-value RDN whose first Common Name matches the permitted constraint and whose second Common Name is attacker-chosen, causing the constraint check to accept the flattened first value. If the certificate contains no subjectAlternativeName extension, the second Common Name can then be accepted as a hostname; Botan does not fall back to Common Name hostname matching when any subjectAlternativeName is present. The exposure is limited to deployments using DN name constraints, which are uncommon outside internal PKIs, and to certificates without a subjectAlternativeName. This issue is fixed in version 3.13.0.SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having low severity.
| CVSS detail | SUSE |
|---|---|
| Base Score | 2.2 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | High |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality Impact | None |
| Integrity Impact | Low |
| Availability Impact | None |
| CVSSv3 Version | 3.1 |
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 2.1 | 2.1 |
| Vector | CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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:X/V:X/RE:X/U:X | CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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:X/V:X/RE:X/U:X |
| Attack Vector | Network | Network |
| Attack Complexity | High | High |
| Attack Requirements | Present | Present |
| Privileges Required | High | High |
| User Interaction | None | None |
| Vulnerable System Confidentiality Impact | None | None |
| Vulnerable System Integrity Impact | Low | Low |
| Vulnerable System Availability Impact | None | None |
| Subsequent System Confidentiality Impact | None | None |
| Subsequent System Integrity Impact | Low | Low |
| Subsequent System Availability Impact | None | None |
| CVSSv4 Version | 4.0 | 4.0 |
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 Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise Server 12 SP5 | Botan | Affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS | Botan | Affected |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | Botan | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | Botan | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise Desktop 12 | Botan | Affected |
| SUSE Linux Enterprise Desktop 12 SP1 | Botan | Affected |
| SUSE Linux Enterprise Desktop 12 SP2 | Botan | Affected |
| SUSE Linux Enterprise Desktop 12 SP3 | Botan | Affected |
| SUSE Linux Enterprise Desktop 12 SP4 | Botan | Affected |
| SUSE Linux Enterprise Server 12 | Botan | Affected |
| SUSE Linux Enterprise Server 12 SP1 | Botan | Affected |
| SUSE Linux Enterprise Server 12 SP2 | Botan | Affected |
| SUSE Linux Enterprise Server 12 SP3 | Botan | Affected |
| SUSE Linux Enterprise Server 12 SP4 | Botan | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 | Botan | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP1 | Botan | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | Botan | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | Botan | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | Botan | Affected |
| SUSE Linux Enterprise Software Development Kit 12 | Botan | Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP1 | Botan | Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP2 | Botan | Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP3 | Botan | Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP4 | Botan | Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | Botan | Affected |
SUSE Timeline for this CVE
CVE page created: Mon Nov 9 17:40:30 2026CVE page last modified: Mon Nov 9 17:40:30 2026