A flaw was found in the 389-ds-base LDAP Server. This issue occurs when issuing a Modify DN LDAP operation through the ldap protocol, when the function return value is not tested and a NULL pointer is dereferenced. If a privileged user performs a ldap MODDN operation after a failed operation, it could lead to a Denial of Service (DoS) or system crash.
This vulnerability has a CVSS score of 4.9, categorizing it as medium severity. While it may not be the highest priority, organizations should remain vigilant as it pertains to their operational integrity.
Risk to organizations includes potential service disruption, which could impact availability, especially in environments relying heavily on LDAP services for user authentication.
Given the current exploit status is awaiting analysis, it is crucial for organizations to assess their exposure and plan for remediation in their patch management cycles.
Vulnerability Details
The CVE-2025-2487 vulnerability is characterized as a flaw in the 389-ds-base LDAP Server, specifically linked to improper handling of function return values leading to NULL pointer dereferencing. This vulnerability is particularly concerning for systems where privileged users can execute LDAP operations.
The CVSS score of 4.9 reflects a medium severity level, indicating a moderate impact on availability, as the availability impact is classified as high. The vulnerability was published on March 18, 2025, and is classified under CWE-476.
Technical Analysis
The root cause of this vulnerability lies in the failure to adequately test the return value of a function in the Modify DN LDAP operation. If a privileged user executes a MODDN operation after an unsuccessful attempt, the system may attempt to dereference a NULL pointer, leading to a crash.
The attack vector is classified as network-based, with low complexity involved in executing the attack. It requires high privileges, specifically those granted to privileged users within the system, and does not necessitate user interaction.
The impact on confidentiality and integrity is negligible; however, the availability impact is high, which could result in a denial of service if exploited.
Risk & Impact Analysis
Real-world deployment risk includes the potential for service outages, especially in environments where the LDAP server is critical for authentication and directory services. The blast radius could be substantial, affecting multiple services reliant on LDAP.
Organizations should assess the urgency based on the CVSS score of 4.9, which indicates a medium risk. While it may not require immediate action, it should be included in the priority patch cycle to mitigate potential service disruptions.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Specific affected versions of 389-ds-base LDAP Server have not been disclosed. Organizations should assume all versions prior to the vendor patch are vulnerable.
Mitigation & Remediation
Organizations should prioritize patching immediately. Updates addressing this vulnerability should be reviewed and applied as part of the routine patch management process.
If a patch is not available, consider implementing network controls to limit access to the LDAP service and monitor system logs for any abnormal activity.
Detection Guidance
Detection of exploitation attempts may revolve around monitoring logs for failed Modify DN operations, specifically those involving privileged users. Look for repeated patterns that may indicate an attack vector.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-2487 illustrates the importance of robust error handling in software development. The pattern of vulnerabilities emerging from improper function return value handling is a recurring theme that security teams must address.
Organizations should learn from this vulnerability to enhance their secure coding practices, possibly by incorporating thorough peer code reviews and static analysis tools within their development workflows.
Security teams are encouraged to stay informed about similar vulnerabilities through continuous security testing, which can help uncover hidden issues before they can be exploited.
For further insights into penetration testing, organizations can benefit from our penetration testing services to strengthen their security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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