---
title: "CVE-2019-3883\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-2019-3883?format=md
keywords: index, follow
---

# CVE-2019-3883

Publication date 17 April 2019

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**5.3 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2019-3883?format=md#impact-score)

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## Description

In 389-ds-base up to version 1.4.1.2, requests are handled by workers
threads. Each sockets will be waited by the worker for at most
'ioblocktimeout' seconds. However this timeout applies only for
un-encrypted requests. Connections using SSL/TLS are not taking this
timeout into account during reads, and may hang longer.An unauthenticated
attacker could repeatedly create hanging LDAP requests to hang all the
workers, resulting in a Denial of Service.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| 389-ds-base | 26.04 LTS resolute | Needs evaluation |
| 25.10 questing | Not affected |
| 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 23.04 lunar | Not affected |
| 22.10 kinetic | Not affected |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Not affected |
| 21.04 hirsute | Not affected |
| 20.10 groovy | Not affected |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Not affected |
| 19.04 disco | Ignored end of life |
| 18.10 cosmic | Ignored end of life |
| 18.04 LTS bionic | Vulnerable |
| 16.04 LTS xenial | Vulnerable |
| 14.04 LTS trusty | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.3 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.3 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3883)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-3883)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-3883)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2019-3883)

### Other references

* <https://bugzilla.redhat.com/show_bug.cgi?id=1693612>
* <https://pagure.io/389-ds-base/issue/50329>
* <https://www.cve.org/CVERecord?id=CVE-2019-3883>