CVE-2009-1179 in CUPS
Summary
by MITRE
Integer overflow in 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.
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Analysis
by VulDB Data Team • 12/14/2024
The vulnerability identified as CVE-2009-1179 represents a critical integer overflow condition within JBIG2 decoder implementations across multiple PDF processing libraries and systems. This flaw exists in software versions including Xpdf 3.02pl2 and earlier, CUPS 1.3.9 and earlier, and Poppler before 0.10.6, creating a significant security risk that can be exploited remotely through maliciously crafted PDF documents. The vulnerability stems from improper handling of integer values during the decoding process of JBIG2 compressed image data, which is commonly embedded within PDF files for efficient document storage and transmission.
The technical implementation of this vulnerability occurs when the JBIG2 decoder processes compressed image data that contains malformed integer values in its header structures. During the decompression process, these malformed values can cause integer overflow conditions when the software attempts to calculate buffer sizes or memory allocation requirements for image data reconstruction. When an attacker crafts a PDF file with specifically designed JBIG2 data containing oversized integer values, the overflow can result in memory corruption that allows arbitrary code execution. This type of vulnerability falls under CWE-190, which specifically addresses integer overflow conditions, and represents a classic example of how improper input validation can lead to memory safety issues.
The operational impact of this vulnerability extends across multiple computing environments where PDF processing is utilized, including web browsers, document viewers, print servers, and content management systems. Attackers can leverage this vulnerability by delivering malicious PDF files through various attack vectors such as email attachments, compromised websites, or file sharing platforms. The remote execution capability means that simply opening or previewing the malicious document can trigger the exploit, making it particularly dangerous in enterprise environments where users frequently interact with PDF documents from untrusted sources. This vulnerability directly maps to ATT&CK technique T1203, which involves exploiting software vulnerabilities to gain code execution, and T1059, which covers command and scripting interpreter usage in exploitation scenarios.
Mitigation strategies for this vulnerability require immediate patching of affected software components, with system administrators prioritizing updates to Xpdf, CUPS, Poppler, and any other software libraries that implement JBIG2 decoding functionality. Organizations should implement network-based security controls such as PDF file content filtering and sandboxing mechanisms to prevent execution of potentially malicious documents. Additionally, users should be educated about the risks of opening PDF files from untrusted sources, and organizations should consider implementing automated vulnerability scanning tools to identify systems running vulnerable software versions. The vulnerability demonstrates the importance of robust input validation and memory safety practices in multimedia processing libraries, particularly those handling compressed image formats that require complex decoding algorithms and precise memory management during decompression operations.