CVE-2018-1346 in eDirectory
Summary
by MITRE
Addresses denial of service attack to eDirectory versions prior to 9.1.
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Analysis
by VulDB Data Team • 02/22/2023
The vulnerability identified as CVE-2018-1346 represents a critical denial of service weakness affecting Novell eDirectory software versions before 9.1. This issue stems from insufficient input validation within the directory service implementation, creating an exploitable condition that allows remote attackers to disrupt service availability. The vulnerability specifically impacts the eDirectory server component that handles network requests and authentication processes, making it a significant concern for organizations relying on this directory service for enterprise identity management.
Technical exploitation of CVE-2018-1346 occurs through malformed network packets or crafted requests that trigger memory corruption or resource exhaustion within the eDirectory processing pipeline. The flaw exists in the protocol handling layer where incoming requests are parsed without adequate bounds checking or sanitization mechanisms. When malicious input reaches the vulnerable processing functions, it causes the service to crash or become unresponsive, effectively denying legitimate users access to directory services. This type of vulnerability aligns with CWE-129, which describes improper validation of array index values, and CWE-770, concerning allocation of resources without limits or throttling.
The operational impact of this vulnerability extends beyond simple service disruption, as it can compromise the entire directory infrastructure that many enterprise applications depend upon. Organizations utilizing eDirectory for user authentication, group policy management, and single sign-on services face potential cascading failures when this vulnerability is exploited. The attack surface is particularly broad since directory services typically operate as core infrastructure components accessible across network boundaries, making them attractive targets for adversaries seeking to cause maximum disruption. According to ATT&CK framework technique T1499.004, this vulnerability enables denial of service attacks that can be classified as network denial of service operations.
Mitigation strategies for CVE-2018-1346 require immediate implementation of the vendor-provided security patches and updates for eDirectory versions 9.1 and later. Organizations should also implement network segmentation and access controls to limit exposure of vulnerable systems, while monitoring for suspicious network traffic patterns that may indicate exploitation attempts. Additional protective measures include configuring firewalls to restrict unnecessary network access to directory service ports and implementing intrusion detection systems to identify potential attack signatures. The vulnerability demonstrates the importance of maintaining up-to-date directory service implementations and highlights the critical need for proper input validation in enterprise infrastructure components that handle external communications.