CVE-2019-3883

HIGH

389 Directory Server < 1.4.1.2 - Unauthenticated Denial of Service via SSL/TLS Connection Hang

Title source: llm
STIX 2.1

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.

References (7)

Core 7
Core References
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2019/05/msg00008.html
Third Party Advisory vendor-advisory
https://access.redhat.com/errata/RHSA-2019:1896
Third Party Advisory vendor-advisory
https://access.redhat.com/errata/RHSA-2019:3401
Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3883
Issue Tracking, Third Party Advisory
https://pagure.io/389-ds-base/issue/50329

Scores

CVSS v3 7.5
EPSS 0.0843
EPSS Percentile 94.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-772
Status published
Products (3)
debian/debian_linux 8.0
fedoraproject/389_directory_server < 1.4.1.2
redhat/enterprise_linux 6.0
Published Apr 17, 2019
Tracked Since Feb 18, 2026