CVE-2011-4079: Openldap

Medium severity, CVSS 4.0. EPSS: 3.3% chance of exploitation in the next 30 days.

Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.

Affected products

• Openldap Openldap: up to and including 2.4.26; version 1.0 only; version 1.0.1 only; version 1.0.2 only; version 1.0.3 only; version 1.1 only; …

Published 2011-10-27. Last modified 2026-06-16.