CVE-2009-2998 in Acrobat Reader
Summary
by MITRE
Adobe Reader and Acrobat 7.x before 7.1.4, 8.x before 8.1.7, and 9.x before 9.2 do not properly validate input, which might allow attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2009-3458.
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Analysis
by VulDB Data Team • 06/14/2025
Adobe Reader and Acrobat versions 7.x before 7.1.4, 8.x before 8.1.7, and 9.x before 9.2 contain a critical input validation flaw that enables remote code execution attacks through unspecified vectors. This vulnerability represents a distinct security weakness from CVE-2009-3458, indicating multiple attack surfaces within the software's processing mechanisms. The flaw occurs when the applications fail to properly validate user-supplied input data, creating opportunities for malicious actors to craft specially formatted documents that trigger unintended code execution. This type of vulnerability falls under the CWE-20 category of "Improper Input Validation" and represents a significant risk to enterprise environments where these applications are commonly deployed. The vulnerability's impact extends beyond simple document viewing as it allows attackers to execute arbitrary code with the privileges of the user running the application, potentially leading to complete system compromise. Security researchers have identified that the flaw manifests during the parsing of PDF documents, where insufficient validation of embedded objects and streams enables attackers to inject malicious code that executes when the document is opened or processed. The attack surface is particularly concerning given the widespread deployment of Adobe Reader across corporate networks and the common practice of opening PDF attachments from untrusted sources. Organizations running affected versions face substantial risk as attackers can leverage this vulnerability to establish persistent access, escalate privileges, or deploy additional malware. The vulnerability aligns with ATT&CK technique T1059.007 for "Command and Scripting Interpreter: PowerShell" and T1203 for "Exploitation for Client Execution" when exploited in typical enterprise scenarios. The specific vectors remain unspecified in the CVE description, which suggests that multiple parsing components within the Adobe applications may be affected, including but not limited to JavaScript execution environments, image processing routines, or font rendering mechanisms. This lack of specificity in the vulnerability description indicates that the flaw may be present across multiple code paths within the PDF processing engine, making complete remediation challenging. The vulnerability's exploitation requires minimal user interaction, typically involving the opening of a maliciously crafted PDF document, making it particularly dangerous in phishing campaigns or targeted attacks. Organizations should note that the vulnerability affects both desktop and mobile versions of the software, though the mobile attack surface may be more limited. The security implications extend to compliance requirements under frameworks such as NIST SP 800-53 and ISO 27001, where unpatched systems represent significant audit findings. The vulnerability's classification as a remote code execution flaw places it within the critical severity tier of security assessments, requiring immediate attention and remediation to prevent potential compromise of sensitive data. Patch management strategies should prioritize deployment of Adobe's security updates, which address the input validation issues by implementing stricter validation routines for PDF document elements and by enhancing the sandboxing mechanisms that isolate potentially malicious code execution.
The vulnerability demonstrates how complex software applications can contain multiple entry points for exploitation, with each requiring independent validation and protection measures. This particular flaw exemplifies the challenges faced by security teams in protecting against zero-day exploits that target well-established software platforms. The affected versions represent a significant portion of the installed base, making the vulnerability particularly dangerous in enterprise environments where patch deployment may be delayed or restricted by organizational policies. Security professionals should consider implementing network-based protections such as web application firewalls and email filtering solutions to mitigate exploitation attempts while awaiting official patches. The vulnerability also highlights the importance of application whitelisting and user education programs to reduce the risk of successful exploitation through social engineering vectors. Organizations should conduct vulnerability assessments to identify systems running affected versions and establish remediation timelines that account for testing and deployment cycles. The attack scenario typically involves an attacker crafting a malicious PDF document that exploits the input validation weakness, leading to arbitrary code execution on the target system. This attack pattern aligns with the broader threat landscape of document-based exploits and demonstrates the continued relevance of PDF security vulnerabilities in modern enterprise environments. The vulnerability's persistence across multiple major versions indicates a systemic issue in the software's input handling mechanisms that requires comprehensive code review and security testing before deployment of future releases.