CVE-2001-1307 in iPlanet Directory Server
Summary
by MITRE
Buffer overflows in iPlanet Directory Server 4.1.4 and earlier (LDAP) allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code, as demonstrated by the PROTOS LDAPv3 test suite.
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Analysis
by VulDB Data Team • 04/08/2019
The vulnerability identified as CVE-2001-1307 represents a critical buffer overflow flaw within the iPlanet Directory Server version 4.1.4 and earlier implementations. This issue specifically affects the Lightweight Directory Access Protocol LDAP functionality that serves as the foundation for directory services in enterprise environments. The vulnerability arises from inadequate input validation mechanisms within the server's LDAP processing components, creating a scenario where malformed or excessively long input data can overwrite adjacent memory regions beyond the intended buffer boundaries.
The technical exploitation of this vulnerability occurs through the PROTOS LDAPv3 test suite demonstration, which showcases how attackers can craft specific LDAP requests that trigger the buffer overflow condition. When the server processes these malformed requests, the overflow causes unpredictable behavior including application crashes, system instability, and potential code execution privileges. The root cause aligns with CWE-121, which categorizes buffer overflow conditions where insufficient bounds checking allows memory corruption. The vulnerability demonstrates characteristics consistent with CWE-787, representing out-of-bounds write conditions that can lead to arbitrary code execution when attacker-controlled data overflows into executable memory regions.
From an operational impact perspective, this vulnerability presents significant risks to enterprise directory services infrastructure. The denial of service component can render directory services unavailable to legitimate users and applications, disrupting authentication, authorization, and directory lookup operations across the organization. The potential for arbitrary code execution escalates the threat level considerably, as attackers could gain elevated privileges and establish persistent access to the compromised server. This vulnerability affects the core operational continuity of directory services that many enterprise applications depend upon for user management, access control, and identity verification processes.
The attack surface for this vulnerability extends beyond simple remote exploitation, as it can be leveraged by attackers who can submit specially crafted LDAP queries to the vulnerable server. The PROTOS LDAPv3 test suite demonstrates that the vulnerability can be triggered through standard LDAP operations, making it particularly dangerous as it requires minimal specialized knowledge to exploit. The vulnerability's impact aligns with ATT&CK technique T1210, which describes exploitation of remote services through buffer overflow attacks, and represents a classic example of how directory server vulnerabilities can compromise entire enterprise authentication infrastructures.
Mitigation strategies for CVE-2001-1307 should prioritize immediate patching of affected iPlanet Directory Server installations to version 4.1.5 or later, which contains the necessary buffer overflow protections. Network segmentation and access controls should be implemented to restrict LDAP service access to trusted sources only, reducing the attack surface. Regular security assessments of directory services should include vulnerability scanning for similar buffer overflow conditions, and input validation should be strengthened throughout the LDAP processing pipeline. Additionally, monitoring systems should be configured to detect unusual LDAP traffic patterns that may indicate exploitation attempts, while incident response procedures should be updated to address directory service compromise scenarios. The vulnerability highlights the critical importance of maintaining up-to-date directory server implementations and implementing robust input validation controls to prevent similar issues in the future.