CVE-2024-49127 in Windows
Summary
by MITRE • 12/12/2024
Windows Lightweight Directory Access Protocol (LDAP) Remote Code Execution Vulnerability
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Analysis
by VulDB Data Team • 12/12/2024
This vulnerability involves a remote code execution flaw in Windows Lightweight Directory Access Protocol implementations that allows attackers to execute arbitrary code on affected systems without authentication. The issue stems from improper input validation within the LDAP processing components that handle directory service requests, creating opportunities for malicious data injection. Attackers can exploit this weakness by crafting specially formatted LDAP queries that trigger buffer overflows or memory corruption conditions within the target system's directory services stack.
The technical exploitation occurs through manipulation of LDAP bind operations and search requests that traverse the network to Windows domain controllers or other systems running LDAP services. When these malformed requests are processed, they can cause the underlying LDAP service to crash or overwrite memory locations with attacker-controlled data, leading to arbitrary code execution privileges. This vulnerability affects multiple Windows versions including server and workstation operating systems, particularly those configured to support LDAP authentication and directory services.
From an operational perspective, this vulnerability presents a severe risk to enterprise environments where Active Directory services are extensively deployed. The attack surface expands significantly when considering that many applications and services rely on LDAP for user authentication and authorization functions, creating cascading effects that can compromise entire network infrastructures. Organizations with misconfigured firewalls or exposed LDAP ports face heightened exposure since the vulnerability can be exploited from external networks without requiring valid credentials.
The impact extends beyond immediate code execution to include potential privilege escalation scenarios where attackers can leverage the compromised LDAP service to gain elevated system access. This weakness aligns with CWE-121 for buffer overflow conditions and maps to ATT&CK technique T1078 for valid accounts and T1566 for phishing attacks that may lead to exploitation. Security professionals should consider this vulnerability alongside other directory service weaknesses such as Kerberos misconfigurations or weak password policies that could compound the attack surface.
Mitigation strategies include applying Microsoft security patches promptly, implementing network segmentation to limit LDAP service exposure, configuring proper firewall rules to restrict LDAP traffic to trusted networks only, and monitoring for unusual LDAP query patterns. Organizations should also conduct thorough vulnerability assessments of their directory services infrastructure, review LDAP service configurations, and implement intrusion detection systems capable of identifying suspicious LDAP activity. Additionally, disabling unnecessary LDAP services, enforcing strong authentication mechanisms, and regularly auditing access controls provide additional protective layers against exploitation attempts targeting this class of vulnerability.