CVE-2009-3938 in Poppler
Summary
by MITRE
Buffer overflow in the ABWOutputDev::endWord function in poppler/ABWOutputDev.cc in Poppler (aka libpoppler) 0.10.6, 0.12.0, and possibly other versions, as used by the Abiword pdftoabw utility, allows user-assisted remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted PDF file.
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Analysis
by VulDB Data Team • 04/27/2025
The vulnerability described in CVE-2009-3938 represents a critical buffer overflow condition within the Poppler library's ABWOutputDev component, specifically within the ABWOutputDev::endWord function located in poppler/ABWOutputDev.cc. This flaw affects Poppler versions 0.10.6 and 0.12.0, as well as potentially other versions in the affected release series. The vulnerability manifests when the pdftoabw utility, which is part of the Abiword suite, processes maliciously crafted PDF files, creating a scenario where remote attackers can exploit this weakness through user-assisted means to compromise system integrity and availability.
The technical nature of this vulnerability stems from inadequate input validation and memory management within the ABWOutputDev::endWord function, which is responsible for handling word output operations during PDF to AbiWord document conversion processes. When processing specially crafted PDF content, the function fails to properly bounds-check buffer allocations, allowing attackers to write beyond allocated memory regions. This buffer overflow condition creates opportunities for arbitrary code execution or denial of service, depending on exploitation circumstances. The vulnerability operates at the intersection of memory corruption and privilege escalation, where successful exploitation could allow attackers to execute malicious code with the privileges of the affected application process.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it represents a potential path for remote code execution within systems that utilize the affected Poppler library. Systems running applications that depend on pdftoabw or other tools leveraging the vulnerable Poppler library components face significant risk, particularly in environments where PDF processing is performed on untrusted content. The user-assisted nature of the attack means that victims must interact with the malicious PDF file, typically through opening or processing it, which makes this vulnerability particularly dangerous in email attachment scenarios, web-based PDF viewers, or document management systems. Organizations using affected versions of Poppler in their document processing pipelines could experience complete system compromise if this vulnerability is exploited successfully.
Mitigation strategies for CVE-2009-3938 should prioritize immediate patching of affected Poppler versions to the latest stable releases that contain fixes for this buffer overflow condition. System administrators should also implement defensive measures such as restricting PDF processing capabilities for untrusted content, deploying sandboxed environments for PDF handling operations, and monitoring for suspicious file processing activities. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a classic example of how improper input validation can lead to memory corruption vulnerabilities. From an ATT&CK framework perspective, this vulnerability maps to techniques involving code injection and privilege escalation, making it particularly concerning for organizations that rely on PDF processing in their operational workflows. Additional protective measures include network segmentation to limit exposure, implementing web application firewalls to filter suspicious PDF content, and establishing robust patch management procedures to ensure timely remediation of similar vulnerabilities across the organization's software ecosystem.