CVE-2011-2103 in Acrobat
Summary
by MITRE
Adobe Reader and Acrobat 8.x before 8.3 on Windows and Mac OS X allow attackers to execute arbitrary code or cause a denial of service (memory corruption) via unspecified vectors.
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Analysis
by VulDB Data Team • 10/17/2018
Adobe Reader and Acrobat version 8.x prior to 8.3 contain a critical memory corruption vulnerability that affects both Windows and Mac OS X operating systems. This vulnerability falls under the category of unspecified attack vectors, making it particularly dangerous as attackers can exploit multiple potential entry points to deliver malicious payloads. The flaw exists within the processing mechanisms of these widely used document viewers, where improper memory handling allows attackers to manipulate heap structures and potentially execute arbitrary code or trigger denial of service conditions. The vulnerability represents a significant security risk given the prevalence of Adobe Reader across enterprise and personal environments, as it could enable remote code execution without user interaction in many scenarios.
The technical nature of this vulnerability stems from memory corruption issues that occur during the parsing of maliciously crafted PDF files. Attackers can construct specially formatted documents that, when opened by the vulnerable Adobe Reader versions, trigger buffer overflows or use-after-free conditions within the application's memory management routines. These memory corruption flaws are particularly insidious because they can be exploited through various attack vectors including email attachments, web downloads, or malicious websites that serve compromised PDF content. The unspecified nature of the vectors suggests that multiple code paths within the application's PDF processing engine could be compromised, making the attack surface broader than typical memory corruption vulnerabilities.
The operational impact of this vulnerability extends beyond simple exploitation capabilities to encompass significant business continuity risks. Organizations relying on Adobe Reader for document processing face potential compromise of their entire document handling infrastructure, as a single malicious PDF could affect multiple users across different systems. The vulnerability's potential for remote code execution means that attackers could gain full system control, escalate privileges, and access sensitive data stored on affected systems. Additionally, the denial of service component creates operational disruption where legitimate users could be unable to open PDF files, potentially affecting critical business processes that depend on document sharing and collaboration. This vulnerability particularly affects enterprise environments where Adobe Reader is extensively deployed and where users may not be security-aware enough to avoid suspicious documents.
Mitigation strategies for this vulnerability require immediate patching of all affected Adobe Reader installations to version 8.3 or later, as Adobe released security updates specifically addressing this memory corruption issue. Organizations should implement network-based controls such as PDF file filtering at perimeter devices to block potentially malicious documents before they reach end-user systems. Security teams should also consider implementing application whitelisting policies that restrict execution of Adobe Reader only from trusted locations, combined with regular security awareness training to educate users about the dangers of opening suspicious PDF files. The vulnerability aligns with several ATT&CK framework techniques including initial access through malicious files and execution through exploitation of software vulnerabilities, while the CWE classification would likely fall under CWE-119 for memory corruption vulnerabilities. System administrators should also monitor for indicators of compromise such as unusual network connections or file access patterns that could suggest exploitation attempts.