CVE-2020-15719
Publication date 14 July 2020
Last updated 25 August 2025
Ubuntu priority
Description
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| openldap | 20.04 LTS focal |
Not affected
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty |
Not affected
|
Notes
mdeslaur
See RH bug for possible regression fixes per upstream bug, this is an issue with a RH patch to openldap and doesn't apply to upstream openldap. Marking as not-affected since Ubuntu does not carry the patch.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
4.2 · Medium
|
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N |