CVE-2019-13565
HIGHCVSS 7.5/10EPSS 5.01%
Last modified
CVE-2019-13565 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in OpenLDAP 2.x before 2.4.48. When using SASL authentication and session encryption, and relying on the SASL security layers in slapd access controls, it is possible to obtain access that would otherwise be denied via a simple bind for any identity covered in those ACLs. EPSS estimates a 5.01% chance of exploitation in the next 30 days.
Description
An issue was discovered in OpenLDAP 2.x before 2.4.48. When using SASL authentication and session encryption, and relying on the SASL security layers in slapd access controls, it is possible to obtain access that would otherwise be denied via a simple bind for any identity covered in those ACLs. After the first SASL bind is completed, the sasl_ssf value is retained for all new non-SASL connections. Depending on the ACL configuration, this can affect different types of operations (searches, modifications, etc.). In other words, a successful authorization step completed by one user affects the authorization requirement for a different user.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openldap | Openldap | >= 2.0, <= 2.4.47 |
| Canonical | Ubuntu Linux | 12.04 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Canonical | Ubuntu Linux | 19.04 |
| Debian | Debian Linux | 8.0 |
| Opensuse | Leap | 15.0 |
| Opensuse | Leap | 15.1 |
| F5 | Traffix Signaling Delivery Controller | 5.0.0 |
| F5 | Traffix Signaling Delivery Controller | 5.1.0 |
| Apple | Mac Os X | >= 10.13, < 10.13.6 |
| Apple | Mac Os X | >= 10.14, < 10.14.6 |
| Apple | Mac Os X | >= 10.15, < 10.15.2 |
| Apple | Mac Os X | 10.13.6 |
| Apple | Mac Os X | 10.14.6 |
| Oracle | Blockchain Platform | < 21.1.2 |
| Oracle | Zfs Storage Appliance Kit | 8.8 |
| Oracle | Solaris | 11 |
References
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.htmlMailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2019/Dec/26Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00024.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Dec/23Mailing List, Third Party Advisory
- https://support.apple.com/kb/HT210788Third Party Advisory
- https://usn.ubuntu.com/4078-1/Third Party Advisory
- https://usn.ubuntu.com/4078-2/Third Party Advisory
- https://www.openldap.org/its/index.cgi/?findid=9052Mailing List, Vendor Advisory
- https://www.openldap.org/lists/openldap-announce/201907/msg00001.htmlMailing List, Vendor Advisory
- https://www.oracle.com/security-alerts/cpuapr2020.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.htmlMailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2019/Dec/26Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00024.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Dec/23Mailing List, Third Party Advisory
- https://support.apple.com/kb/HT210788Third Party Advisory
- https://usn.ubuntu.com/4078-1/Third Party Advisory
- https://usn.ubuntu.com/4078-2/Third Party Advisory
- https://www.openldap.org/its/index.cgi/?findid=9052Mailing List, Vendor Advisory
- https://www.openldap.org/lists/openldap-announce/201907/msg00001.htmlMailing List, Vendor Advisory
- https://www.oracle.com/security-alerts/cpuapr2020.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-13565?
An issue was discovered in OpenLDAP 2.x before 2.4.48. When using SASL authentication and session encryption, and relying on the SASL security layers in slapd access controls, it is possible to obtain access that would otherwise be denied via a simple bind for any identity covered in those ACLs. After the first SASL bind is completed, the sasl_ssf value is retained for all new non-SASL connections. Depending on the ACL configuration, this can affect different types of operations (searches, modifications, etc.). In other words, a successful authorization step completed by one user affects the authorization requirement for a different user.
How severe is CVE-2019-13565?
CVE-2019-13565 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 5.01% probability of exploitation in the next 30 days.
How do I fix CVE-2019-13565?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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