USN-7828-1: Python LDAP vulnerabilities

Publication date: 20 October 2025
Overview: : Several security issues were fixed in Python LDAP.

Packages
python-ldap - LDAP interface module for Python
Details
It was discovered that Python LDAP incorrectly handled special characters
in the special character filtering function. A remote attacker could
possibly use this issue to perform LDAP injection attacks.
(CVE-2025-61911)

Arad Inbar discovered that Python LDAP incorrectly escaped NUL character
bytes. An attacker could possibly use this issue to cause a denial of
service. (CVE-2025-61912)

Update instructions
The problem can be corrected by updating your system to the following package versions:

• 25.10 questing : python3-ldap – 3.4.4-1ubuntu0.25.10.1
• 25.04 plucky :python3-ldap – 3.4.4-1ubuntu0.25.04.1
• 24.04 LTS noble :python3-ldap – 3.4.4-1ubuntu0.24.04.1
• 22.04 LTS jammy: python3-ldap – 3.2.0-4ubuntu7.2
• 20.04 LTS focal: python3-ldap – 3.2.0-4ubuntu2.1+esm1
• 18.04 LTS bionic: python-ldap – 3.0.0-1ubuntu0.2+esm1
  python3-ldap – 3.0.0-1ubuntu0.2+esm1
• 16.04 LTS xenial :python-ldap – 2.4.22-0.1ubuntu0.1~esm1