CVE-2016-5318 in LibTIFF
Summary
by MITRE
Stack-based buffer overflow in the _TIFFVGetField function in libtiff 4.0.6 and earlier allows remote attackers to crash the application via a crafted tiff.
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Analysis
by VulDB Data Team • 05/14/2026
The vulnerability identified as CVE-2016-5318 represents a critical stack-based buffer overflow within the libtiff library version 4.0.6 and earlier, specifically affecting the _TIFFVGetField function. This flaw exists in the widely used Tagged Image File Format library that handles image processing operations across numerous applications and systems. The vulnerability arises from insufficient bounds checking when processing malformed TIFF files, creating an exploitable condition that can be triggered remotely through crafted input data.
The technical implementation of this vulnerability stems from improper handling of variable-length data structures within the TIFF file parsing mechanism. When the _TIFFVGetField function processes certain malformed TIFF tags, it fails to validate the size of incoming data against the allocated buffer space on the stack. This allows an attacker to provide specially crafted TIFF data that exceeds the buffer boundaries, resulting in memory corruption that can overwrite adjacent stack memory locations. The flaw is classified as a stack-based buffer overflow, which is particularly dangerous because it can lead to arbitrary code execution or application crashes depending on the specific memory corruption patterns.
From an operational perspective, this vulnerability poses significant risks to systems that process TIFF image files from untrusted sources. Applications utilizing libtiff for image handling, including document management systems, image servers, web applications, and digital asset management platforms, become potential targets for remote exploitation. The impact extends beyond simple application crashes to potentially enable privilege escalation or remote code execution, making it a critical concern for enterprise environments where TIFF files may be processed automatically without proper validation. The vulnerability affects a broad range of software ecosystems including web browsers, image viewers, and server applications that rely on libtiff for image processing.
Security professionals should note that this vulnerability aligns with CWE-121 Stack-based Buffer Overflow, which specifically addresses buffer overflows occurring in stack memory regions. The attack vector typically follows the ATT&CK technique T1203 Exploitation for Client Execution, where attackers craft malicious TIFF files to trigger the buffer overflow during normal image processing operations. Mitigation strategies include immediate upgrading to libtiff version 4.0.7 or later, which contains the necessary patches to address the buffer overflow condition. Additionally, implementing proper input validation and sanitization measures for TIFF file processing, along with network segmentation and access controls, can help reduce the attack surface and limit potential exploitation. Organizations should also consider implementing automated patch management systems to ensure timely deployment of security updates across all affected systems.