CVE-2011-2098 in Acrobat
Summary
by MITRE
Adobe Reader and Acrobat 8.x before 8.3, 9.x before 9.4.5, and 10.x before 10.1 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-2011-2099.
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Analysis
by VulDB Data Team • 11/13/2021
Adobe Reader and Acrobat versions prior to specific patches contain a critical memory corruption vulnerability that enables remote code execution and denial of service attacks through unspecified attack vectors. This vulnerability affects multiple product versions including Adobe Reader 8.x before 8.3, Adobe Acrobat 9.x before 9.4.5, and Adobe Reader 10.x before 10.1 across both Windows and Mac OS X operating systems. The flaw represents a distinct issue from CVE-2011-2099 and demonstrates the ongoing security challenges in document processing software that handles complex file formats. The vulnerability stems from improper memory management during the processing of specially crafted PDF files, where insufficient input validation leads to buffer overflows or heap corruption conditions that attackers can exploit to execute arbitrary code within the context of the victim's session.
The technical implementation of this vulnerability involves memory corruption mechanisms that occur when Adobe's PDF rendering engine processes malformed input data. Attackers can craft malicious PDF documents that trigger memory allocation errors, leading to unpredictable program behavior and potential code execution. This type of vulnerability falls under CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write operations. The memory corruption typically manifests through improper handling of user-supplied data during PDF parsing operations, particularly in areas related to object parsing, stream processing, or embedded content handling within the document structure. The vulnerability's exploitation potential is significant as it allows attackers to gain arbitrary code execution privileges, potentially leading to complete system compromise.
The operational impact of this vulnerability extends beyond simple denial of service scenarios to encompass full system compromise capabilities. When successfully exploited, the vulnerability enables attackers to execute malicious code with the privileges of the targeted user, potentially leading to data theft, system infiltration, or deployment of additional malware. The attack surface is particularly broad given that Adobe Reader and Acrobat are widely deployed across enterprise environments and personal computing platforms, making this vulnerability attractive to threat actors seeking to exploit a large user base. Organizations running affected versions face significant risk of targeted attacks, especially in environments where users frequently open PDF documents from untrusted sources or when document handling is automated through web applications or email systems. The vulnerability's presence in multiple product versions indicates a systemic issue within Adobe's PDF processing libraries that required patching across different release channels.
Mitigation strategies for this vulnerability require immediate patch deployment across all affected systems, with particular attention to enterprise environments where PDF processing is common. Organizations should implement comprehensive patch management procedures to ensure timely deployment of security updates from Adobe's official channels. Additional protective measures include implementing email filtering solutions that scan PDF attachments for malicious content, restricting user privileges when opening PDF documents, and deploying application whitelisting policies that limit execution of untrusted PDF processing software. Network-based defenses such as intrusion detection systems can help identify potential exploitation attempts, while user education programs should emphasize the dangers of opening PDF files from unknown sources. The vulnerability highlights the importance of maintaining current security patches and demonstrates how memory corruption flaws in widely-used software can create significant security risks that require immediate remediation. This vulnerability also underscores the need for proper software security testing and code review processes to identify and address memory safety issues before they can be exploited by malicious actors in the field.