========================================================================== Ubuntu Security Notice USN-4744-1 February 22, 2021 openldap vulnerability ========================================================================== 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