Upstream information
Description
Improper Certificate Validation vulnerability in Erlang OTP public_key (pubkey_ocsp module) allows forged OCSP responses signed with an expired responder certificate to be accepted as valid.OCSP response verification in pubkey_ocsp:verify_response/5 and pubkey_ocsp:is_authorized_responder/3 in lib/public_key/src/pubkey_ocsp.erl does not check the validity period (notBefore/notAfter) of the OCSP responder certificate. An attacker who has obtained the private key of an expired CA-designated OCSP responder certificate can forge OCSP responses that Erlang/OTP accepts as valid.
This affects TLS clients using OCSP stapling via the ssl application: a malicious or compromised server can present a revoked TLS certificate together with a forged OCSP response signed by an expired responder key, and the client will accept the revoked certificate as valid. It also affects applications calling public_key:pkix_ocsp_validate/5 directly, where the impact depends on the use case - server-side client certificate validation using this API may allow authentication bypass with a revoked client certificate.
This issue affects OTP from OTP 27.0 before OTP 27.3.4.12, 28.5.0.1, and 29.0.1 corresponding to public_key from 1.16 before 1.17.1.3, 1.20.3.1, and 1.21.1.
SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having important severity.
| CVSS detail | SUSE |
|---|---|
| Base Score | 7.4 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality Impact | High |
| Integrity Impact | High |
| Availability Impact | None |
| CVSSv3 Version | 3.1 |
| CVSS detail | CNA (6b3ad84c-e1a6-4bf7-a703-f496b71e49db) | SUSE |
|---|---|---|
| Base Score | 6.3 | 9.1 |
| Vector | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/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:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
| Attack Vector | Network | Network |
| Attack Complexity | High | High |
| Attack Requirements | Present | Present |
| Privileges Required | None | None |
| User Interaction | None | None |
| Vulnerable System Confidentiality Impact | None | High |
| Vulnerable System Integrity Impact | Low | High |
| Vulnerable System Availability Impact | None | None |
| Subsequent System Confidentiality Impact | Low | None |
| Subsequent System Integrity Impact | Low | None |
| 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 general support and receiving all security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP7 | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | erlang26 | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | erlang | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | erlang26 | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | erlang | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | erlang26 | Not affected |
| SUSE Linux Enterprise Server 16.0 | erlang | Affected |
| SUSE Linux Enterprise Server 16.1 | erlang | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | erlang | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | erlang26 | Not affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | erlang | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | erlang | Affected |
| openSUSE Leap 16.0 | erlang | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | erlang | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP4 | erlang | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP5 | erlang | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP6 | erlang | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP6 | erlang26 | Not affected |
| SUSE Linux Enterprise Server 15 SP4 | erlang | Not affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | erlang | Not affected |
| SUSE Linux Enterprise Server 15 SP5 | erlang | Not affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | erlang | Not affected |
| SUSE Linux Enterprise Server 15 SP6 | erlang | Not affected |
| SUSE Linux Enterprise Server 15 SP6 | erlang26 | Not affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | erlang | Not affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | erlang26 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | erlang | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | erlang26 | Not affected |
| SUSE Manager Proxy 4.3 | erlang | Not affected |
| SUSE Manager Proxy LTS 4.3 | erlang | Not affected |
| SUSE Manager Retail Branch Server 4.3 | erlang | Not affected |
| SUSE Manager Retail Branch Server LTS 4.3 | erlang | Not affected |
| SUSE Manager Server 4.3 | erlang | Not affected |
| SUSE Manager Server LTS 4.3 | erlang | Not affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Enterprise Storage 7 | erlang | Not affected |
| SUSE Enterprise Storage 7.1 | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | erlang | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | erlang26 | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | erlang | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP3 | erlang | Not affected |
| SUSE Linux Enterprise Real Time 15 SP2 | erlang | Not affected |
| SUSE Linux Enterprise Real Time 15 SP3 | erlang | Not affected |
| SUSE Linux Enterprise Real Time 15 SP4 | erlang | Not affected |
| SUSE Linux Enterprise Server 15 SP2 | erlang | Not affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | erlang | Not affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | erlang | Not affected |
| SUSE Linux Enterprise Server 15 SP3 | erlang | Not affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | erlang | Not affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | erlang | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | erlang | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | erlang | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | erlang | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | erlang | Not affected |
| SUSE Manager Proxy 4.1 | erlang | Not affected |
| SUSE Manager Proxy 4.2 | erlang | Not affected |
| SUSE Manager Retail Branch Server 4.1 | erlang | Not affected |
| SUSE Manager Retail Branch Server 4.2 | erlang | Not affected |
| SUSE Manager Server 4.1 | erlang | Not affected |
| SUSE Manager Server 4.2 | erlang | Not affected |
| openSUSE Leap 15.3 | erlang | Not affected |
| openSUSE Leap 15.4 | erlang | Not affected |
| openSUSE Leap 15.5 | erlang | Not affected |
| openSUSE Leap 15.6 | erlang | Not affected |
| openSUSE Leap 15.6 | erlang26 | Not affected |
SUSE Timeline for this CVE
CVE page created: Wed May 27 16:20:30 2026CVE page last modified: Wed May 27 21:28:15 2026