Issue summary: During processing of a crafted CMS EnvelopedData message with KeyTransportRecipientInfo a NULL pointer dereference can happen.
Impact summary: Applications that process attacker-controlled CMS data may crash before authentication or cryptographic operations occur resulting in Denial of Service.
When a CMS EnvelopedData message that uses KeyTransportRecipientInfo with RSA-OAEP encryption is processed, the optional parameters field of RSA-OAEP SourceFunc algorithm identifier is examined without checking for its presence. This results in a NULL pointer dereference if the field is missing.
Applications and services that call CMS_decrypt() on untrusted input (e.g., S/MIME processing or CMS-based protocols) are vulnerable.
The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openssl | Openssl | 1.0.2 (including) | 1.0.2zp (excluding) |
| Openssl | Openssl | 1.1.1 (including) | 1.1.1zg (excluding) |
| Openssl | Openssl | 3.0.0 (including) | 3.0.20 (excluding) |
| Openssl | Openssl | 3.3.0 (including) | 3.3.7 (excluding) |
| Openssl | Openssl | 3.4.0 (including) | 3.4.5 (excluding) |
| Openssl | Openssl | 3.5.0 (including) | 3.5.6 (excluding) |
| Openssl | Openssl | 3.6.0 (including) | 3.6.2 (excluding) |
| Red Hat Enterprise Linux 10 | RedHat | openssl-1:3.5.5-3.el10_2 | * |
| Red Hat Enterprise Linux 8 | RedHat | compat-openssl10-1:1.0.2o-4.el8_10.2 | * |
| Red Hat Enterprise Linux 9 | RedHat | openssl-1:3.5.5-3.el9_8 | * |
| Red Hat Enterprise Linux 9 | RedHat | compat-openssl11-1:1.1.1k-5.el9_8.3 | * |
| Red Hat Enterprise Linux 9 | RedHat | openssl-1:3.5.5-3.el9_8 | * |
| Red Hat Ansible Automation Platform 2.6 | RedHat | ansible-automation-platform-26/lightspeed-chatbot-rhel9:1780102732 | * |
| Red Hat Discovery 2 | RedHat | discovery/discovery-server-rhel9:1778101579 | * |
| Red Hat Hardened Images | RedHat | openssl-main-3.5.6-0.3.hum1 | * |
| Red Hat Hardened Images | RedHat | openssl-main-3.5.6-0.1.hum1 | * |
| Red Hat Insights proxy 1.5 | RedHat | insights-proxy/insights-proxy-container-rhel9:1780420428 | * |
| Red Hat Update Infrastructure 5 | RedHat | rhui5/cds-rhel9:1781525684 | * |
| Red Hat Update Infrastructure 5 | RedHat | rhui5/haproxy-rhel9:1781525671 | * |
| Red Hat Update Infrastructure 5 | RedHat | rhui5/installer-rhel9:1781525693 | * |
| Red Hat Update Infrastructure 5 | RedHat | rhui5/rhua-rhel9:1781525739 | * |
| Edk2 | Ubuntu | esm-apps/xenial | * |
| Nodejs | Ubuntu | esm-apps/jammy | * |
| Nodejs | Ubuntu | esm-apps/xenial | * |
| Nodejs | Ubuntu | jammy | * |
| Openssl | Ubuntu | devel | * |
| Openssl | Ubuntu | esm-infra-legacy/xenial | * |
| Openssl | Ubuntu | esm-infra/bionic | * |
| Openssl | Ubuntu | esm-infra/focal | * |
| Openssl | Ubuntu | esm-infra/xenial | * |
| Openssl | Ubuntu | fips-preview/jammy | * |
| Openssl | Ubuntu | fips-updates/bionic | * |
| Openssl | Ubuntu | fips-updates/focal | * |
| Openssl | Ubuntu | fips-updates/jammy | * |
| Openssl | Ubuntu | fips-updates/xenial | * |
| Openssl | Ubuntu | fips/bionic | * |
| Openssl | Ubuntu | fips/focal | * |
| Openssl | Ubuntu | fips/xenial | * |
| Openssl | Ubuntu | jammy | * |
| Openssl | Ubuntu | noble | * |
| Openssl | Ubuntu | questing | * |
| Openssl | Ubuntu | resolute | * |
| Openssl | Ubuntu | upstream | * |
| Openssl1.0 | Ubuntu | esm-infra/bionic | * |
| Openssl1.0 | Ubuntu | upstream | * |
Potential Mitigations
References
- https://github.com/openssl/openssl/commit/01194a8f1941115cd0383bfa91c736dd3993c8bc
- https://github.com/openssl/openssl/commit/2e39b7a6993be445fddb9fbce316fa756e0397b6
- https://github.com/openssl/openssl/commit/af2a5fecd3e71a29e7568f9c1453dec5cebbaff4
- https://github.com/openssl/openssl/commit/ea7b4ea4f9f853521ba34830cbcadc970d2e0788
- https://github.com/openssl/openssl/commit/fd2f1a6cf53b9ceeca723a001aa4b825d7c7ee75
- https://openssl-library.org/news/secadv/20260407.txt
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html