OpenIdentityPlatform OpenDJ up to 4.9.2 LDAP Request infinite loop

Summaryinfo

A vulnerability was found in OpenIdentityPlatform OpenDJ up to 4.9.2. It has been classified as problematic. This issue affects some unknown processing of the component LDAP Request Handler. The manipulation leads to infinite loop. This vulnerability is traded as CVE-2025-27497. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in OpenIdentityPlatform OpenDJ up to 4.9.2. It has been rated as problematic. This issue affects an unknown code block of the component LDAP Request Handler. The manipulation with an unknown input leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is availability. The summary by CVE is:

OpenDJ is an LDAPv3 compliant directory service. OpenDJ prior to 4.9.3 contains a denial-of-service (DoS) vulnerability that causes the server to become unresponsive to all LDAP requests without crashing or restarting. This issue occurs when an alias loop exists in the LDAP database. If an ldapsearch request is executed with alias dereferencing set to "always" on this alias entry, the server stops responding to all future requests. Fortunately, the server can be restarted without data corruption. This vulnerability is fixed in 4.9.3.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-27497 since 02/26/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 4.9.3 eliminates this vulnerability. Applying the patch 08aee4724608e4a32baa3c7d7499ec913a275aaf is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Directory Service Software

Vendor

• OpenIdentityPlatform

Name

• OpenDJ

Version

• 4.9.0
• 4.9.1
• 4.9.2

License

• open-source

Website

• Product: https://github.com/OpenIdentityPlatform/OpenDJ/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion