Ubuntu Security Notices
USN-4744-1

USN-4744-1: OpenLDAP vulnerability

Publication date

22 February 2021

Overview

OpenLDAP could be made to crash if it received specially crafted network traffic.

Releases

20.10 20.04 LTS 18.04 LTS 16.04 LTS

Packages

openldap - Lightweight Directory Access Protocol

Details

Pasi Saarinen discovered that OpenLDAP incorrectly handled certain short
timestamps. A remote attacker could possibly use this issue to cause
OpenLDAP to crash, resulting in a denial of service.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release	Package Version
20.10 groovy	slapd – 2.4.53+dfsg-1ubuntu1.4
20.04 focal	slapd – 2.4.49+dfsg-2ubuntu1.7
18.04 bionic	slapd – 2.4.45+dfsg-1ubuntu1.10
16.04 xenial	slapd – 2.4.42+dfsg-2ubuntu3.13

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References

CVE-2021-27212

CVE-2021-27212