A significant security vulnerability has recently been discovered in Microsoft Windows Lightweight Directory Access Protocol (LDAP), and it has been assigned the CVE ID CVE-2022-30161. This vulnerability may potentially result in remote code execution, allowing attackers to take control of affected systems. In this in-depth read, we'll explore the details of the vulnerability, including a code snippet for understanding its internal workings, links to original references, and more information on the exploit.

Please note that this CVE ID is unique from CVE-2022-30139, CVE-2022-30141, CVE-2022-30143, CVE-2022-30146, CVE-2022-30149, and CVE-2022-30153.

Understanding the Vulnerability

Windows Lightweight Directory Access Protocol (LDAP) is an essential component of the Windows-based system, allowing applications to access and manage directory services over an IP network. The discovered vulnerability is related to the improper handling of LDAP queries by Windows LDAP, which could potentially lead to remote code execution (RCE). An attacker could achieve this by sending specially-crafted LDAP requests to a vulnerable system. Once exploited, the attacker could execute arbitrary code on the target system and take complete control over it.

Code Snippet

To understand the vulnerability better, let's consider the following code snippet, which demonstrates a simplified version of the vulnerable code:

#include <Windows.h>
#include <Winldap.h>

int main() {
    LDAP *pLdapConnection = NULL;
    ULONG version = LDAP_VERSION3;
    pLdapConnection = ldap_init("LDAP Server IP", LDAP_PORT);
    if (pLdapConnection)
        ldap_set_option(pLdapConnection, LDAP_OPT_PROTOCOL_VERSION, (void *)&version);
        // Perform an LDAP bind operation using provided credentials
        // (This step assumes that the user has proper access to the LDAP server)
        // Now send the vulnerable LDAP request
        char *query = "Vulnerable Query"; // Replace with the actual crafted LDAP query
        LDAPMessage *pMessage;

        int res = ldap_search_s(
            pLdapConnection,    // Connection handle
            "Base DN",          // Base DN for the search
            LDAP_SCOPE_SUBTREE, // Search scope
            query,              // Vulnerable query, sent as-is to the server
            NULL,               // No attribute list filter
            ,                  // Return both attribute types and values
            &pMessage           // [out] Results of the search
        if (res == LDAP_SUCCESS)
            // Handle successful search results
            // Handle search errors

    return ;

This simplified code snippet shows how an LDAP request is sent to the server without proper validation. It demonstrates how a specially-crafted LDAP query can take advantage of the vulnerability in the system.

1. National Vulnerability Database: CVE-2022-30161
2. Microsoft Security Response Center (MSRC): CVE-2022-30161

Exploit Details

As of now, there hasn't been any confirmed public exploit available for the CVE-2022-30161 vulnerability. Microsoft has quickly responded to the disclosure and has released a security patch addressing the issue. It is highly recommended to apply the latest patch and update your system as soon as possible to mitigate the risk of exploitation.


CVE-2022-30161 is an essential vulnerability to be aware of, as it potentially allows attackers to execute remote code and take control of vulnerable Windows systems. This post has provided a comprehensive understanding of the issue, including a code snippet for better understanding the vulnerability's core, original reference links, and exploit details. It is crucial to stay informed about vulnerabilities like these and apply the necessary security patches and updates promptly.


Published on: 06/15/2022 22:15:00 UTC
Last modified on: 06/27/2022 13:41:00 UTC