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Ubuntu Security Notice USN-4634-2

Ubuntu Security Notice USN-4634-2
Posted Nov 23, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4634-2 - USN-4634-1 fixed several vulnerabilities in OpenLDAP. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. 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. Various other issues were also addressed.

tags | advisory, remote, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-25709
MD5 | 39cf896ad02b5474669afbc680180429

Ubuntu Security Notice USN-4634-2

Change Mirror Download
=========================================================================
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

Summary:

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

Software Description:
- openldap: Lightweight Directory Access Protocol

Details:

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.

References:
https://usn.ubuntu.com/4634-2
https://usn.ubuntu.com/4634-1
CVE-2020-25709, CVE-2020-25710
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