CVE-2010-2571 in Publisher
Summary
by MITRE
Array index error in pubconv.dll (aka the Publisher Converter DLL) in Microsoft Publisher 2002 SP3 and 2003 SP3 allows remote attackers to execute arbitrary code via a crafted Publisher 97 file, aka "Memory Corruption Due To Invalid Index Into Array in Pubconv.dll Vulnerability."
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Analysis
by VulDB Data Team • 10/07/2021
The vulnerability identified as CVE-2010-2571 represents a critical memory corruption flaw within Microsoft Publisher 2002 SP3 and 2003 SP3 applications. This issue resides in the pubconv.dll component, which serves as the Publisher Converter DLL responsible for handling various file format conversions. The vulnerability manifests when the application processes specially crafted Publisher 97 files, creating a scenario where an attacker can manipulate array indexing operations to trigger arbitrary code execution. This represents a classic buffer overflow condition that has been classified under CWE-129, which specifically addresses the issue of insufficient checking of array indices, leading to memory corruption vulnerabilities.
The technical exploitation of this vulnerability occurs through improper validation of array boundaries within the pubconv.dll module. When Microsoft Publisher encounters a malformed Publisher 97 file, the application fails to properly validate array indices during the conversion process, allowing an attacker to craft malicious input that causes the application to write data beyond the allocated memory boundaries. This memory corruption enables attackers to execute arbitrary code with the privileges of the user running the vulnerable application, typically resulting in complete system compromise. The vulnerability follows the ATT&CK technique T1203 - Exploitation for Client Execution, where adversaries leverage application vulnerabilities to execute malicious code on target systems.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a potent vector for privilege escalation and persistent access to affected systems. Organizations running Microsoft Publisher 2002 SP3 or 2003 SP3 are particularly at risk when processing untrusted Publisher files, as these applications may be invoked automatically during document handling or when users open suspicious attachments. The vulnerability affects a wide range of enterprise environments where legacy publishing software remains in use, making it a persistent threat in corporate networks. Attackers can leverage this vulnerability through various attack vectors including email attachments, web downloads, or file sharing platforms, making it particularly dangerous in environments where users may inadvertently open malicious documents. The memory corruption aspect of this vulnerability aligns with ATT&CK technique T1068 - Exploitation for Privilege Escalation, as successful exploitation can provide attackers with elevated privileges to perform further malicious activities within the compromised environment.
Mitigation strategies for CVE-2010-2571 should focus on immediate patching of affected Microsoft Publisher installations, followed by network-level controls to prevent execution of untrusted Publisher files. Organizations should implement strict file validation policies and consider disabling automatic execution of Publisher files in email clients and web browsers. The vulnerability demonstrates the importance of proper input validation and array boundary checking in software development practices, aligning with CWE-129 requirements for implementing robust validation mechanisms. Security teams should also monitor for exploitation attempts through network intrusion detection systems and implement application whitelisting controls to prevent execution of vulnerable applications. Microsoft has addressed this vulnerability through security updates, and organizations should ensure all systems are patched according to Microsoft's recommended security guidance to prevent successful exploitation attempts.