USN-2742-1: OpenLDAP vulnerabilities

Ubuntu Security Notice USN-2742-1

16th September, 2015

openldap vulnerabilities

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

  • Ubuntu 15.04
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS

Summary

Several security issues were fixed in OpenLDAP.

Software description

  • openldap - OpenLDAP utilities

Details

Denis Andzakovic discovered that OpenLDAP incorrectly handled certain BER
data. A remote attacker could possibly use this issue to cause OpenLDAP to
crash, resulting in a denial of service. (CVE-2015-6908)

Dietrich Clauss discovered that the OpenLDAP package incorrectly shipped
with a potentially unsafe default access control configuration. Depending
on how the database is configure, this may allow users to impersonate
others by modifying attributes such as their Unix user and group numbers.
(CVE-2014-9713)

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 15.04:
slapd 2.4.31-1+nmu2ubuntu12.3
Ubuntu 14.04 LTS:
slapd 2.4.31-1+nmu2ubuntu8.2
Ubuntu 12.04 LTS:
slapd 2.4.28-1.1ubuntu4.6

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

For existing installations, access rules that begin with "to *" need to be
manually adjusted to remove any instances of "by self write".

References

CVE-2014-9713, CVE-2015-6908