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Date: November 28, 2021
The LDAP schema parser of python-ldap 3.3.1 and earlier are vulnerable to a regular expression denial-of-service attack. The issue affects clients that use ldap.schema package to parse LDAP schema definitions from an untrusted source. The upcoming release of python-ldap 3.4.0 will contain a workaround to prevent ReDoS attacks. The schema parser refuses schema definitions with an excessive amount of backslashes.
Weakness Type (CWE)
Uncontrolled Resource Consumption ('Resource Exhaustion')CWE-400
Upgrade to version python-ldap - 3.4.0
|Attack Vector (AV):||NETWORK|
|Attack Complexity (AC):||LOW|
|Privileges Required (PR):||LOW|
|User Interaction (UI):||NONE|