CVE-2012-4158 in Acrobat Reader
Summary
by MITRE
Adobe Reader and Acrobat 9.x before 9.5.2 and 10.x before 10.1.4 on Windows and Mac OS X allow attackers to execute arbitrary code or cause a denial of service (memory corruption) via unspecified vectors, a different vulnerability than CVE-2012-2051, CVE-2012-4147, CVE-2012-4148, CVE-2012-4149, CVE-2012-4150, CVE-2012-4151, CVE-2012-4152, CVE-2012-4153, CVE-2012-4154, CVE-2012-4155, CVE-2012-4156, CVE-2012-4157, CVE-2012-4159, and CVE-2012-4160.
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Analysis
by VulDB Data Team • 10/15/2018
This vulnerability affects Adobe Reader and Acrobat versions prior to 9.5.2 and 10.1.4 on Windows and Mac OS X platforms, representing a critical memory corruption flaw that enables remote code execution or denial of service conditions. The vulnerability exists within the handling of unspecified vectors in the software's processing mechanisms, making it particularly dangerous as it operates outside the scope of previously identified related vulnerabilities. The flaw manifests through memory corruption issues that can be exploited by attackers to gain unauthorized system access or disrupt service availability. This type of vulnerability typically arises from improper input validation or buffer overflow conditions within the application's code execution paths. The memory corruption aspect suggests that attackers can manipulate memory structures to execute malicious code with the privileges of the targeted user. Such vulnerabilities are particularly concerning in enterprise environments where Adobe Reader is commonly used for document processing, as they can serve as initial access points for broader attacks. The vulnerability's classification aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read vulnerabilities. These memory corruption issues often map to ATT&CK technique T1059, where adversaries leverage command execution capabilities to establish persistence or escalate privileges. The unspecified nature of the attack vectors in this CVE makes it particularly challenging for security teams to implement targeted defenses, as the exact exploitation mechanisms are not publicly disclosed, requiring broader mitigation approaches.
The technical implementation of this vulnerability likely involves improper memory management during document parsing operations, where the application fails to properly validate or sanitize input data before processing. Attackers can craft malicious PDF documents that trigger memory corruption when the vulnerable software attempts to render or process specific elements within the document. The memory corruption can occur during various stages including font handling, image processing, or embedded object execution, depending on the specific implementation flaw. This vulnerability demonstrates the inherent risks in complex software applications that must parse and render various document formats while maintaining memory safety. The exploitation process typically requires the user to open a maliciously crafted PDF file, making social engineering a potential attack vector. The vulnerability's presence in both Windows and Mac OS X platforms indicates a cross-platform flaw in Adobe's implementation, suggesting the issue may stem from shared libraries or common code paths. Security researchers often categorize such vulnerabilities as zero-day exploits when first discovered, as they represent previously unknown attack surfaces that can be leveraged for unauthorized access. The fact that this vulnerability is separate from other CVEs in the same year indicates a distinct code path or processing mechanism within the Adobe applications. This separation from related vulnerabilities suggests that the flaw exists in a different component or module of the software, making it necessary for organizations to apply patches specifically addressing this issue rather than relying on broader security updates.
Organizations utilizing affected Adobe Reader and Acrobat versions face significant operational risks, including potential data breaches, system compromise, and service disruption. The vulnerability's potential for remote code execution means that attackers can deploy malware, establish backdoors, or perform privilege escalation attacks without requiring physical access to target systems. The memory corruption nature of the flaw can also lead to system instability, causing unexpected application crashes or system hangs that result in denial of service conditions. Enterprise environments are particularly vulnerable as the software is widely deployed for document handling across various departments, increasing the attack surface. The exploitation of this vulnerability can lead to lateral movement within networks, as compromised systems can serve as launch points for further attacks against other network resources. Organizations must consider the business impact of potential data loss or system downtime, especially in sectors where document processing is critical to operations. The vulnerability's impact extends beyond immediate exploitation to include long-term security implications, as compromised systems may remain undetected for extended periods. Incident response teams need to be prepared to handle potential breaches originating from this vulnerability, including forensic analysis of compromised systems and network monitoring for suspicious activities. The cross-platform nature of the vulnerability requires security teams to implement consistent patch management across different operating systems, adding complexity to the remediation process.
Mitigation strategies for this vulnerability should prioritize immediate patch deployment to all affected systems, as Adobe released updates specifically addressing this issue in versions 9.5.2 and 10.1.4. Organizations should implement network segmentation to limit the potential impact of exploitation, particularly by restricting access to PDF processing capabilities from untrusted networks. Security teams should consider deploying application whitelisting solutions to prevent execution of unauthorized Adobe Reader versions, while also implementing email filtering to block potentially malicious PDF attachments. Regular vulnerability assessments and penetration testing should be conducted to identify any remaining exposure points in the environment. System monitoring should be enhanced to detect unusual memory usage patterns or application behavior that may indicate exploitation attempts. The implementation of sandboxing technologies can provide additional protection by isolating PDF processing in restricted environments. Organizations should also develop and maintain incident response procedures specifically addressing memory corruption vulnerabilities, ensuring rapid identification and containment of potential breaches. Security awareness training programs should emphasize the importance of avoiding suspicious PDF files and reporting potential security incidents. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date software versions and implementing comprehensive security controls. Regular security audits should verify that all systems have been properly patched and that security configurations remain effective against evolving threat landscapes. The remediation process should include thorough testing of patches to ensure compatibility with existing business applications and workflows. Organizations must also consider implementing multiple layers of defense to protect against similar vulnerabilities that may be discovered in the future, recognizing that memory corruption flaws often represent persistent security challenges in complex software environments.