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AUSCERT External Security Bulletin Redistribution
7 May 2019
AusCERT Security Bulletin Summary
Operating System: Debian GNU/Linux 8
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2019-3883
Comment: This advisory references vulnerabilities in products which run on
platforms other than Debian. It is recommended that administrators
running 389-ds-base check for an updated version of the software for
their operating system.
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Package : 389-ds-base
Version : 184.108.40.206-4+deb8u6
CVE ID : CVE-2019-3883
Debian Bug : 927939
In 389-ds-base up to version 220.127.116.11, requests were handled by worker
threads. Each socket had been waited for by the worker for at most
'ioblocktimeout' seconds. However, this timeout applied only to
un-encrypted requests. Connections using SSL/TLS were not taking this
timeout into account during reads, and may have hung longer. An
unauthenticated attacker could have repeatedly created hanging LDAP
requests to hang all the workers, resulting in a Denial of Service.
For Debian 8 "Jessie", this problem has been fixed in version
We recommend that you upgrade your 389-ds-base packages.
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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