CVE-2005-1212 in Windows
Summary
by MITRE
Buffer overflow in Microsoft Step-by-Step Interactive Training (orun32.exe) allows remote attackers to execute arbitrary code via a bookmark link file (.cbo, cbl, or .cbm extension) with a long User field.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 07/04/2025
The vulnerability identified as CVE-2005-1212 represents a critical buffer overflow flaw within Microsoft Step-by-Step Interactive Training software, specifically affecting the orun32.exe component. This software component is designed to handle bookmark link files with extensions .cbo, .cbl, and .cbm, which are used to store user navigation data and preferences within the interactive training environment. The flaw manifests when the application processes these bookmark files without proper input validation, creating a condition where maliciously crafted User field data can exceed the allocated buffer space. The vulnerability falls under the CWE-121 buffer overflow category, specifically classified as a stack-based buffer overflow, where insufficient bounds checking allows attackers to overwrite adjacent memory locations. This type of vulnerability is particularly dangerous because it can be exploited to execute arbitrary code with the privileges of the affected application, potentially leading to complete system compromise. The attack vector is remote, meaning that an attacker can deliver the malicious bookmark file through various network channels without requiring local access to the target system.
The technical exploitation of this vulnerability occurs when a user opens a specially crafted bookmark file containing an excessively long User field value. The orun32.exe process allocates a fixed-size buffer to store this User field data, typically using insecure functions like strcpy or sprintf that do not perform bounds checking. When the malicious data exceeds the buffer capacity, it overflows into adjacent memory regions, potentially corrupting the stack frame and overwriting return addresses or other critical control data. This memory corruption can be manipulated to redirect program execution flow to malicious code injected into the buffer or located elsewhere in memory. The vulnerability demonstrates characteristics consistent with the ATT&CK technique T1203, where adversaries leverage software vulnerabilities to gain execution privileges, and specifically aligns with T1059 for command and scripting interpreter usage in executing malicious payloads. Attackers can leverage this flaw to establish persistent access, escalate privileges, or deploy additional malware components within the compromised system environment.
The operational impact of CVE-2005-1212 extends beyond immediate code execution capabilities to encompass broader security implications for organizations relying on Microsoft Step-by-Step Interactive Training software. Systems running affected versions of the software become potential entry points for attackers seeking to infiltrate corporate networks or compromise sensitive data environments. The vulnerability affects both desktop and server deployments where the training software is installed, creating widespread exposure across different system architectures. Organizations utilizing this training platform may face significant security risks, including unauthorized access to training materials, data exfiltration, and potential lateral movement within network perimeters. The remote exploit nature means that attackers can target vulnerable systems through email attachments, web downloads, or other network-delivered content without requiring physical access or specialized local privileges. This vulnerability also demonstrates the importance of proper input validation and secure coding practices, as the flaw could have been prevented through implementation of bounds checking mechanisms or use of safer string handling functions. The exploitation of such vulnerabilities often results in compliance violations under cybersecurity frameworks like NIST SP 800-53, particularly affecting controls related to system and information integrity, access control, and vulnerability management. Organizations must implement immediate mitigations including software patching, network segmentation, and user education to prevent exploitation of this vulnerability across their operational environments.