CVE-2009-3609 in Poppler
Summary
by MITRE
Integer overflow in the ImageStream::ImageStream function in Stream.cc in Xpdf before 3.02pl4 and Poppler before 0.12.1, as used in GPdf, kdegraphics KPDF, and CUPS pdftops, allows remote attackers to cause a denial of service (application crash) via a crafted PDF document that triggers a NULL pointer dereference or buffer over-read.
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Analysis
by VulDB Data Team • 12/07/2024
The vulnerability identified as CVE-2009-3609 represents a critical integer overflow flaw affecting PDF processing libraries that has significant implications for document rendering applications. This issue resides within the ImageStream::ImageStream function in the Stream.cc file of Xpdf library versions prior to 3.02pl4 and Poppler library versions before 0.12.1. The flaw manifests when these libraries process specially crafted PDF documents, creating conditions that can lead to application instability and denial of service. The vulnerability affects widely deployed software including GPdf, kdegraphics KPDF, and CUPS pdftops components, making it particularly concerning for system administrators and security professionals managing document processing environments.
The technical nature of this vulnerability stems from improper handling of integer values during PDF stream processing operations. When a malicious PDF document contains crafted data that triggers an integer overflow condition, the application's memory management becomes compromised. This overflow specifically affects the calculation of buffer sizes or array indices used during image stream processing, resulting in either a NULL pointer dereference or buffer over-read conditions. The underlying mechanism operates through CWE-190, which classifies integer overflow and underflow conditions as a fundamental weakness in software design that can lead to memory corruption and arbitrary code execution. The flaw demonstrates characteristics consistent with CWE-129, which addresses issues related to insufficient boundary checking of array data access, and CWE-787, which covers out-of-bounds write operations.
The operational impact of this vulnerability extends beyond simple denial of service scenarios to potentially compromise entire document processing workflows. Remote attackers can exploit this weakness by simply providing a malicious PDF document to any application that relies on the vulnerable libraries, without requiring authentication or special privileges. The consequences include application crashes that can disrupt document viewing services, printing operations, and automated document processing pipelines. In enterprise environments where PDF handling is critical for business operations, this vulnerability can lead to significant service interruptions and productivity losses. The attack vector is particularly dangerous because it can be triggered through common document sharing mechanisms, web browsers, or email attachments, making it difficult to prevent through traditional network security measures alone.
Mitigation strategies for CVE-2009-3609 must address both immediate remediation and long-term security posture improvements. The primary recommendation involves upgrading all affected systems to versions of Xpdf 3.02pl4 or later and Poppler 0.12.1 or later, which contain the necessary patches to prevent integer overflow conditions. Organizations should also implement network-level filtering to restrict access to potentially malicious PDF content, particularly in environments where users may encounter untrusted documents. Additional protective measures include deploying sandboxing mechanisms around PDF processing applications, implementing strict input validation for all PDF documents, and monitoring application logs for signs of exploitation attempts. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and denial of service, with potential for lateral movement if exploited in systems that process documents from multiple sources. Security teams should also consider implementing automated vulnerability scanning to identify systems running outdated versions of these libraries and establish regular patch management procedures to prevent similar issues in the future.