CVE-2009-3606 in Poppler
Summary
by MITRE
Integer overflow in the PSOutputDev::doImageL1Sep function in Xpdf before 3.02pl4, and Poppler 0.x, as used in kdegraphics KPDF, might allow remote attackers to execute arbitrary code via a crafted PDF document that triggers a heap-based buffer overflow.
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Analysis
by VulDB Data Team • 12/07/2024
The vulnerability identified as CVE-2009-3606 represents a critical integer overflow flaw affecting PDF rendering libraries that impacts the security posture of numerous applications. This vulnerability specifically resides within the PSOutputDev::doImageL1Sep function in Xpdf versions prior to 3.02pl4 and Poppler 0.x implementations. The flaw manifests when processing PDF documents containing specially crafted image data that triggers a heap-based buffer overflow condition, creating potential for remote code execution. The vulnerability affects kdegraphics KPDF and other applications that rely on these underlying PDF rendering libraries, making it a widespread concern across multiple software ecosystems. The integer overflow occurs during the processing of layered image data where insufficient bounds checking allows an attacker to manipulate integer values that subsequently control buffer allocation sizes.
The technical exploitation of this vulnerability follows a well-established pattern within the realm of memory corruption flaws. When a PDF document contains malformed image data, the PSOutputDev::doImageL1Sep function processes this data without adequate validation of integer parameters that determine buffer allocation sizes. This allows an attacker to manipulate the integer values such that they overflow beyond the normal range, resulting in a heap buffer overflow when the application attempts to allocate memory for the image data. The overflow occurs because the application calculates buffer sizes using potentially malicious integer inputs that exceed the maximum representable value for the integer type, leading to unexpectedly small buffer sizes that cause subsequent memory writes to overwrite adjacent memory regions. This type of vulnerability is categorized under CWE-190 as an integer overflow condition and aligns with ATT&CK technique T1059.007 for execution through remote code manipulation.
The operational impact of this vulnerability extends far beyond simple exploitation, as it provides attackers with a pathway to achieve arbitrary code execution on systems processing PDF documents. The attack surface includes any application that utilizes the vulnerable Xpdf or Poppler libraries, particularly affecting desktop environments, web browsers, and document viewers. Security researchers have noted that the vulnerability can be triggered through simple web-based attacks, where users simply need to open a malicious PDF document to be compromised. The remote execution capability makes this particularly dangerous in enterprise environments where users may encounter malicious PDF attachments through email or web browsing. The vulnerability also affects mobile and embedded systems that rely on these libraries for PDF processing, demonstrating the widespread nature of the flaw across different computing platforms and use cases.
Mitigation strategies for CVE-2009-3606 require immediate patching of affected software components to address the integer overflow condition in the PDF rendering libraries. System administrators should prioritize updating Xpdf to version 3.02pl4 or later, and Poppler to versions that contain the relevant fixes. Organizations should implement network-based protections including PDF content filtering and sandboxing mechanisms to prevent exploitation attempts. The vulnerability highlights the importance of input validation and bounds checking in memory management operations, particularly for integer arithmetic calculations that determine buffer sizes. Security teams should also consider implementing application whitelisting and restricted user permissions to limit the potential impact of successful exploitation attempts. Additionally, regular security assessments and vulnerability scanning should be conducted to identify and remediate similar integer overflow conditions within other software libraries and applications that may be susceptible to similar flaws.