CVE-2009-1180 in CUPS
Summary
by MITRE
The JBIG2 decoder in Xpdf 3.02pl2 and earlier, CUPS 1.3.9 and earlier, Poppler before 0.10.6, and other products allows remote attackers to execute arbitrary code via a crafted PDF file that triggers a free of invalid data.
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Analysis
by VulDB Data Team • 12/14/2024
The vulnerability identified as CVE-2009-1180 represents a critical buffer over-read condition affecting JBIG2 image decoding implementations across multiple PDF processing libraries and systems. This flaw exists in the memory management mechanisms of JBIG2 decoders within Xpdf version 3.02pl2 and earlier, CUPS version 1.3.9 and earlier, and Poppler versions prior to 0.10.6. The vulnerability stems from improper validation of image data structures during the decompression process, specifically when handling malformed JBIG2 compressed data within PDF documents. When a maliciously crafted PDF file containing specially constructed JBIG2 image data is processed, the decoder attempts to free memory locations that do not correspond to valid allocated memory regions, leading to potential arbitrary code execution.
The technical exploitation of this vulnerability occurs through a classic heap-based buffer over-read attack pattern that aligns with CWE-125, which describes out-of-bounds read vulnerabilities. Attackers can construct PDF documents containing malformed JBIG2 data that, when processed by vulnerable systems, triggers memory corruption conditions. The flaw manifests during the decompression phase where the decoder fails to properly validate the bounds of allocated memory regions before attempting to free them. This memory corruption can be leveraged by attackers to execute arbitrary code with the privileges of the affected application, typically resulting in remote code execution on systems processing PDF documents. The vulnerability demonstrates characteristics consistent with ATT&CK technique T1203, which involves exploiting memory corruption vulnerabilities to gain code execution privileges.
The operational impact of this vulnerability extends across numerous enterprise and consumer systems that rely on PDF processing capabilities, including web browsers, document viewers, print servers, and content management systems. Organizations using affected versions of Xpdf, CUPS, or Poppler components face significant risk exposure when processing untrusted PDF documents, as these systems are commonly deployed in environments where users may encounter maliciously crafted documents. The vulnerability affects not only desktop applications but also server-side PDF processing systems, creating potential denial of service conditions and unauthorized access scenarios. Systems that automatically process PDF attachments or handle document uploads from untrusted sources are particularly vulnerable to exploitation. The widespread adoption of these affected libraries across different software platforms amplifies the potential attack surface, making this vulnerability particularly concerning for security administrators managing diverse IT environments.
Mitigation strategies for CVE-2009-1180 require immediate patching of affected systems with updated versions of the vulnerable libraries, specifically upgrading to Xpdf 3.02pl3, CUPS 1.3.10, or Poppler 0.10.6 and later releases. Organizations should implement network-based filtering measures to block or scan PDF attachments at network boundaries, particularly when these documents originate from untrusted sources. Additionally, system administrators should consider disabling JBIG2 image processing capabilities in affected applications when this functionality is not required for business operations. Regular vulnerability assessments should be conducted to identify and remediate similar memory corruption vulnerabilities in other PDF processing components. Security monitoring should include detection of unusual memory access patterns and potential exploitation attempts targeting similar buffer overflow conditions in document processing systems. The remediation process should also involve comprehensive testing of patched systems to ensure that the vulnerability is properly addressed without introducing regressions in functionality.