CVE-2018-3861 in PhotoLine
Summary
by MITRE
A specially crafted TIFF image processed via the application can lead to an out-of-bounds write, overwriting arbitrary data. An attacker can deliver a TIFF image to trigger this vulnerability and gain code execution.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 02/28/2023
The vulnerability identified as CVE-2018-3861 represents a critical out-of-bounds write flaw in image processing applications that handle TIFF file formats. This issue stems from inadequate input validation and memory management within the image parsing routines that process TIFF metadata and pixel data. The vulnerability manifests when applications attempt to parse maliciously crafted TIFF files, leading to memory corruption that can be exploited for arbitrary code execution. The flaw specifically occurs during the decompression and rendering phases of TIFF image processing where buffer boundaries are not properly enforced.
The technical implementation of this vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-787, which covers out-of-bounds write vulnerabilities. The attack vector involves an adversary delivering a specially constructed TIFF image file that contains malformed data structures within its metadata or image data segments. When the vulnerable application processes this image, the parsing logic fails to validate array indices or buffer sizes, allowing subsequent memory writes to overwrite adjacent memory locations. This memory corruption can overwrite critical program data, function pointers, or return addresses, enabling attackers to redirect execution flow and ultimately achieve remote code execution.
From an operational perspective, this vulnerability presents significant risk to organizations relying on image processing applications across multiple platforms including web browsers, document viewers, and content management systems. The exploitability of CVE-2018-3861 is enhanced by the widespread use of TIFF format in enterprise environments and the ease with which attackers can craft malicious files. The vulnerability can be triggered through various attack surfaces including web applications, email attachments, and file sharing systems where TIFF images are processed automatically. The impact extends beyond simple privilege escalation as successful exploitation can lead to complete system compromise, data exfiltration, and persistence mechanisms within target environments.
Mitigation strategies for CVE-2018-3861 should focus on immediate patch management and input validation improvements. Organizations must prioritize updating all affected applications to versions containing proper bounds checking and memory management fixes. Network-based mitigations including file type filtering and sandboxing of image processing components can provide additional protection layers. The implementation of strict input validation controls and memory safety features such as stack canaries, address space layout randomization, and control flow integrity checks should be enforced. Security monitoring should include detection of unusual image processing patterns and attempts to parse malformed TIFF files. This vulnerability also aligns with ATT&CK technique T1059.007 for command and script interpreter, as successful exploitation typically involves code execution through compromised image processing pipelines, making it a critical target for defensive security measures.