Description
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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Directory LDAP API | 2.1.0 – < 2.1.9 | 2.1.9 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | apache-directory-api | 2.1.9-1 | — |
| Debian 13 | apache-directory-api | No fix yet | — |
| Debian 12 | apache-directory-api | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | apache-directory-api | No fix yet | — |
| Ubuntu 26.04 LTS | apache-directory-api | No fix yet | — |
| Ubuntu 24.04 LTS | apache-directory-api | No fix yet | — |
| Ubuntu 22.04 LTS | apache-directory-api | No fix yet | — |
| Ubuntu 20.04 LTS | apache-directory-api | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | apache-directory-api | No fix yet | — |
| Ubuntu 16.04 LTS | apache-directory-api | No fix yet | — |