Apache Directory LDAP API: Denial of service via excessive bcrypt cost factor in stored passwords
0Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Track
exploitation probability
—
observed exploitation
nono source reports it
Asymmetric Resource Consumption vulnerability in Apache Directory LDAP API.
Storing a password using the bcrypt algorithm with a high force like 30 in a LDAP server that supports this algorithm will cause the server CPU to run for hours checking the credentials. A bounded cost should be enforced to avoid a server DOS.
This issue affects Apache Directory LDAP API: from 2.1.0 before 2.1.9.
Users are recommended to upgrade to version 2.1.9, which fixes the issue.
Affected products
Apache Software Foundation · Apache Directory LDAP API