USN-7828-1: Python LDAP vulnerabilities

Publication date

20 October 2025

Overview

Several security issues were fixed in Python LDAP.


Packages

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)

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
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  

Reduce your security exposure

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