CVE-2009-0509 in Acrobat
Summary
by MITRE
Heap-based buffer overflow in the JBIG2 filter in Adobe Reader 7 and Acrobat 7 before 7.1.3, Adobe Reader 8 and Acrobat 8 before 8.1.6, and Adobe Reader 9 and Acrobat 9 before 9.1.2 allows remote attackers to execute arbitrary code via a crafted file that triggers memory corruption.
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Analysis
by VulDB Data Team • 10/16/2018
The vulnerability identified as CVE-2009-0509 represents a critical heap-based buffer overflow affecting Adobe Reader and Acrobat software across multiple versions. This flaw resides within the JBIG2 filter component, which is responsible for processing JBIG2 compressed image data commonly used in document formats. The vulnerability manifests when the software processes maliciously crafted files that contain malformed JBIG2 data, leading to memory corruption that can be exploited by remote attackers to execute arbitrary code on affected systems.
The technical implementation of this vulnerability stems from inadequate input validation and memory management within the JBIG2 decoding routines. When Adobe Reader or Acrobat encounters a specially crafted JBIG2 compressed image within a document, the software fails to properly bounds-check the data during decompression operations. This allows attackers to overwrite adjacent memory locations on the heap, potentially corrupting critical data structures or function pointers. The heap-based nature of the overflow means that the corruption occurs in dynamically allocated memory regions, making exploitation more complex but also more likely to succeed in causing system instability or unauthorized code execution.
The operational impact of CVE-2009-0509 is significant given the widespread deployment of Adobe Reader and Acrobat across enterprise environments and individual users. Attackers can leverage this vulnerability through various attack vectors including email attachments, web downloads, or malicious websites hosting compromised documents. The remote execution capability means that users need not interact with the malicious file directly, as simply opening a compromised document in Adobe Reader can trigger the exploit. This makes the vulnerability particularly dangerous in targeted attacks where social engineering can be used to deliver malicious documents to unsuspecting users. The vulnerability affects multiple versions of Adobe's software, creating a broad attack surface that extends across different organizational security postures.
Organizations should prioritize immediate patch management to address this vulnerability, as Adobe released security updates for all affected versions including Reader 7.x before 7.1.3, Reader 8.x before 8.1.6, and Reader 9.x before 9.1.2. Beyond patching, security teams should implement network-based protections such as content filtering and sandboxing techniques to prevent users from accessing potentially malicious documents. The vulnerability aligns with CWE-121 heap-based buffer overflow classification and maps to attack techniques in the MITRE ATT&CK framework under initial access and execution phases. Organizations should also consider implementing additional defensive measures including user education about suspicious document attachments, email filtering rules, and monitoring for unusual document processing behavior that might indicate exploitation attempts.