---
title: "CVE-2019-13565\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2019-13565?format=md
keywords: index, follow
---

# CVE-2019-13565

Publication date 26 July 2019

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2019-13565?format=md#impact-score)

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## 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.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| openldap | 19.04 disco | Fixed 2.4.47+dfsg-3ubuntu2.1 |
| 18.04 LTS bionic | Fixed 2.4.45+dfsg-1ubuntu1.3 |
| 16.04 LTS xenial | Fixed 2.4.42+dfsg-2ubuntu3.6 |
| 14.04 LTS trusty | Fixed 2.4.31-1+nmu2ubuntu8.5+esm1  Ubuntu Pro |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2019-13565?format=md#patch-details)

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### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| openldap | * Upstream:   <http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commit;h=744a46a1acb93798f4e027290191d6a11dd4c18c> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | None |
  | Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-13565)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-13565)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-13565)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2019-13565)

### Related Ubuntu Security Notices (USN)

+ [USN-4078-1](https://usn.ubuntu.com/USN-4078-1)
+ OpenLDAP vulnerabilities
+ 30 July 2019

+ [USN-4078-2](https://usn.ubuntu.com/USN-4078-2)
+ OpenLDAP vulnerabilities
+ 19 August 2019

### Other references

* <https://www.openldap.org/lists/openldap-announce/201907/msg00001.html>
* <https://www.cve.org/CVERecord?id=CVE-2019-13565>