An OpenLDAP security update has been released for Ubuntu Linux 16.04 LTS, 18.04 LTS, 20.04 LTS, and 20.10.
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Ubuntu Security Notice USN-4744-1
February 22, 2021
openldap vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
OpenLDAP could be made to crash if it received specially crafted network
traffic.
Software Description:
- 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:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.10:
slapd 2.4.53+dfsg-1ubuntu1.4
Ubuntu 20.04 LTS:
slapd 2.4.49+dfsg-2ubuntu1.7
Ubuntu 18.04 LTS:
slapd 2.4.45+dfsg-1ubuntu1.10
Ubuntu 16.04 LTS:
slapd 2.4.42+dfsg-2ubuntu3.13
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4744-1
CVE-2021-27212
Package Information:
https://launchpad.net/ubuntu/+source/openldap/2.4.53+dfsg-1ubuntu1.4
https://launchpad.net/ubuntu/+source/openldap/2.4.49+dfsg-2ubuntu1.7
https://launchpad.net/ubuntu/+source/openldap/2.4.45+dfsg-1ubuntu1.10
https://launchpad.net/ubuntu/+source/openldap/2.4.42+dfsg-2ubuntu3.13
