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Ubuntu Security Notice USN-4634-1

Ubuntu Security Notice USN-4634-1
Posted Nov 17, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4634-1 - 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.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2020-25709
MD5 | ac51b434ea0844b87b92c98d0c3e8907

Ubuntu Security Notice USN-4634-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4634-1
November 17, 2020

openldap vulnerabilities
==========================================================================

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:

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 20.10:
slapd 2.4.53+dfsg-1ubuntu1.2

Ubuntu 20.04 LTS:
slapd 2.4.49+dfsg-2ubuntu1.5

Ubuntu 18.04 LTS:
slapd 2.4.45+dfsg-1ubuntu1.8

Ubuntu 16.04 LTS:
slapd 2.4.42+dfsg-2ubuntu3.11

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

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

Package Information:
https://launchpad.net/ubuntu/+source/openldap/2.4.53+dfsg-1ubuntu1.2
https://launchpad.net/ubuntu/+source/openldap/2.4.49+dfsg-2ubuntu1.5
https://launchpad.net/ubuntu/+source/openldap/2.4.45+dfsg-1ubuntu1.8
https://launchpad.net/ubuntu/+source/openldap/2.4.42+dfsg-2ubuntu3.11
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