CVE-2001-1315 in Injoin Directory Server
Summary
by MITRE
Critical Path (1) InJoin Directory Server or (2) LiveContent Directory allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via malformed BER encodings, as demonstrated by the PROTOS LDAPv3 test suite.
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Analysis
by VulDB Data Team • 06/13/2024
The vulnerability identified as CVE-2001-1315 affects Critical Path InJoin Directory Server and Critical Path LiveContent Directory systems, representing a significant security flaw that enables remote attackers to compromise system integrity and availability. This issue stems from inadequate input validation mechanisms within the directory server implementations, specifically concerning the handling of Basic Encoding Rules (BER) encoded data structures that are fundamental to LDAP protocol communications. The vulnerability operates at the protocol level where malformed BER encodings can trigger unexpected behavior in the receiving server applications, creating potential attack vectors for both denial of service and arbitrary code execution scenarios.
The technical implementation of this vulnerability exploits weaknesses in the BER decoding processes used by these directory services, where the servers fail to properly validate or sanitize incoming data before processing it. When malformed BER encodings are received, the parsing routines within the directory servers can encounter unexpected data patterns that lead to memory corruption, stack overflows, or other exploitable conditions. This flaw aligns with CWE-129, which addresses improper validation of input boundaries, and CWE-125, which covers out-of-bounds read conditions that can occur when processing malformed data structures. The PROTOS LDAPv3 test suite demonstration indicates that the vulnerability can be reliably triggered through specific BER encoding patterns that exploit buffer handling inconsistencies in the affected software implementations.
The operational impact of this vulnerability extends beyond simple service disruption to encompass potential system compromise and unauthorized access capabilities. Remote attackers can leverage this flaw to crash directory services, effectively creating denial of service conditions that prevent legitimate users from accessing directory information and services. More critically, the potential for arbitrary code execution means that successful exploitation could allow attackers to gain control over the affected systems, potentially leading to complete compromise of the directory infrastructure and associated network resources. This vulnerability particularly affects organizations that rely heavily on directory services for authentication, authorization, and information management, as the compromise of directory servers can cascade into broader system security failures.
Mitigation strategies for CVE-2001-1315 should prioritize immediate patch application from Critical Path, as the vulnerability represents a critical risk that has been documented for over two decades. Organizations should implement network segmentation and access controls to limit exposure of directory services to untrusted networks, while also deploying intrusion detection systems to monitor for suspicious BER encoding patterns. The implementation of input validation controls and robust error handling mechanisms within directory server configurations can provide additional defense-in-depth measures. Security teams should also consider implementing network monitoring solutions that can detect and alert on malformed BER traffic patterns, aligning with ATT&CK technique T1071.004 for application layer protocol manipulation. Regular security assessments and vulnerability scanning should be conducted to identify any unpatched systems and ensure proper configuration of directory services to minimize exposure to similar encoding-based vulnerabilities.