[USN-4634-2] OpenLDAP vulnerabilities

Leonidas S. Barbosa leo.barbosa at canonical.com
Mon Nov 23 13:06:52 UTC 2020

Ubuntu Security Notice USN-4634-2
November 23, 2020

openldap vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM


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

Software Description:
- openldap: Lightweight Directory Access Protocol


USN-4634-1 fixed several vulnerabilities in OpenLDAP. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

 It was discovered that OpenLDAP incorrectly handled certain malformed
 inputs. 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 14.04 ESM:
  slapd                           2.4.31-1+nmu2ubuntu8.5+esm4

Ubuntu 12.04 ESM:
  slapd                           2.4.28-1.1ubuntu4.12

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

  CVE-2020-25709, CVE-2020-25710
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