CVE-2016-4336 in Perspective Document Filter
Summary
by MITRE
An exploitable out-of-bounds write exists in the Bzip2 parsing of the Lexmark Perspective Document Filters conversion functionality. A crafted Bzip2 document can lead to a stack-based buffer overflow causing an out-of-bounds write which under the right circumstance could potentially be leveraged by an attacker to gain arbitrary code execution.
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Analysis
by VulDB Data Team • 04/20/2025
The vulnerability identified as CVE-2016-4336 represents a critical security flaw within the Bzip2 decompression functionality of Lexmark Perspective Document Filters, a component commonly used in enterprise printing solutions and document processing systems. This issue manifests as an out-of-bounds write condition that occurs during the parsing of compressed Bzip2 documents, specifically when these documents are processed through the document conversion pipeline. The vulnerability resides in the way the software handles decompressed data, particularly when dealing with malformed or specially crafted Bzip2 archives that trigger unexpected behavior in the memory management routines.
The technical implementation of this vulnerability stems from insufficient bounds checking during the Bzip2 decompression process within the Lexmark Perspective Document Filters. When a maliciously constructed Bzip2 file is processed, the decompression algorithm fails to properly validate the size and structure of the decompressed data against the allocated buffer boundaries. This oversight creates a stack-based buffer overflow condition where the program attempts to write data beyond the allocated memory space, resulting in an out-of-bounds write operation. The vulnerability is classified under CWE-121 as a stack-based buffer overflow, which represents a well-known and dangerous class of memory corruption vulnerabilities that can be exploited for arbitrary code execution.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it presents a significant risk to enterprise environments that rely on Lexmark printers and document processing systems. Attackers who successfully exploit this vulnerability can potentially execute arbitrary code with the privileges of the affected application, which typically runs with elevated permissions due to its role in document processing and printing operations. The attack vector requires the victim to process a specially crafted Bzip2 document, which could occur through various means such as email attachments, web downloads, or file transfers within networked environments. This makes the vulnerability particularly concerning for organizations that handle sensitive documents or operate in threat-rich environments where targeted attacks are common.
Mitigation strategies for CVE-2016-4336 should focus on both immediate remediation and long-term architectural improvements to prevent similar vulnerabilities from emerging. Organizations should prioritize applying the vendor-supplied patches or updates that address the buffer overflow condition in the Bzip2 parsing implementation. Additionally, implementing network-level controls such as email filtering and web proxy configurations can help prevent the delivery of malicious Bzip2 files to end users. The vulnerability demonstrates the importance of input validation and bounds checking in security-critical applications, aligning with ATT&CK technique T1059.007 for command and scripting interpreter execution. Security teams should also consider implementing runtime protections such as stack canaries, address space layout randomization, and data execution prevention mechanisms to reduce the exploitability of similar buffer overflow vulnerabilities. Regular security assessments and code reviews focusing on memory management practices can help identify and remediate similar issues before they can be exploited in the wild, reinforcing the principle of defense in depth as outlined in cybersecurity frameworks such as NIST SP 800-53.