// For flags

CVE-2017-7551

389-ds-base: Password brute-force possible for locked account due to different return codes

Severity Score

9.8
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

389-ds-base version before 1.3.5.19 and 1.3.6.7 are vulnerable to password brute-force attacks during account lockout due to different return codes returned on password attempts.

389-ds-base en su versión anterior a 1.3.5.19 y 1.3.6.7 es vulnerable a ataques de fuerza bruta de contraseñas durante un bloqueo de cuenta debido a los diferentes códigos de retorno que se devuelven durante los intentos de contraseña.

A flaw was found in the way 389-ds-base handled authentication attempts against locked accounts. A remote attacker could potentially use this flaw to continue password brute-forcing attacks against LDAP accounts, thereby bypassing the protection offered by the directory server's password lockout policy.

389 Directory Server is an LDAP version 3 compliant server. The base packages include the Lightweight Directory Access Protocol server and command-line utilities for server administration. Security Fix: A flaw was found in the way 389-ds-base handled authentication attempts against locked accounts. A remote attacker could potentially use this flaw to continue password brute-forcing attacks against LDAP accounts, thereby bypassing the protection offered by the directory server's password lockout policy.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2017-04-05 CVE Reserved
  • 2017-08-16 CVE Published
  • 2024-08-05 CVE Updated
  • 2024-08-05 First Exploit
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-209: Generation of Error Message Containing Sensitive Information
  • CWE-640: Weak Password Recovery Mechanism for Forgotten Password
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Fedoraproject
Search vendor "Fedoraproject"
 389 Directory Server
Search vendor "Fedoraproject" for product "389 Directory Server"
 1.3.5.19
Search vendor "Fedoraproject" for product "389 Directory Server" and version "1.3.5.19"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 389 Directory Server
Search vendor "Fedoraproject" for product "389 Directory Server"
 1.3.6.7
Search vendor "Fedoraproject" for product "389 Directory Server" and version "1.3.6.7"
-
Affected