libldap in certain third-party OpenLDAP packages has a certificate-validation flaw when the third-party package is asserting RFC6125 support. It considers CN even when there is a non-matching subjectAltName (SAN). This is fixed in, for example, openldap-2.4.46-10.el8 in Red Hat Enterprise Linux.
Weakness
The product does not validate, or incorrectly validates, a certificate.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openldap | Openldap | * | 2.4.46-10.el8 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | openldap-0:2.4.46-10.el8 | * |
| Openldap | Ubuntu | eoan | * |
| Openldap | Ubuntu | trusty | * |
Potential Mitigations
Related Attack Patterns
References
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00033.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00059.html
- https://access.redhat.com/errata/RHBA-2019:3674
- https://bugs.openldap.org/show_bug.cgi?id=9266
- https://bugzilla.redhat.com/show_bug.cgi?id=1740070
- https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10365
- https://www.oracle.com/security-alerts/cpuapr2022.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00033.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00059.html
- https://access.redhat.com/errata/RHBA-2019:3674
- https://bugs.openldap.org/show_bug.cgi?id=9266
- https://bugzilla.redhat.com/show_bug.cgi?id=1740070
- https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10365
- https://www.oracle.com/security-alerts/cpuapr2022.html