CVE-2018-3886 in PhotoLine
Summary
by MITRE
A memory corruption vulnerability exists in the PCX-parsing functionality of Computerinsel Photoline 20.53. A specially crafted PCX image processed via the application can lead to an out-of-bounds write, overwriting arbitrary data. An attacker can deliver a PCX image to trigger this vulnerability and gain code execution.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 02/27/2023
The vulnerability identified as CVE-2018-3886 represents a critical memory corruption flaw within Computerinsel Photoline version 20.53 that specifically targets the PCX image file parsing functionality. This type of vulnerability falls under the category of buffer overflow conditions that can be exploited to execute arbitrary code within the context of the vulnerable application. The flaw exists in how the software processes PCX image files, which are a common bitmap image format that has been in use since the 1980s and continues to be supported by various image processing applications. The vulnerability is particularly concerning because it allows for out-of-bounds write operations that can overwrite arbitrary data in memory, potentially leading to complete system compromise.
The technical implementation of this vulnerability stems from insufficient bounds checking within the PCX parsing code. When the Photoline application encounters a malformed PCX file, the parsing routine fails to properly validate the image dimensions or data structure parameters before attempting to write data to memory buffers. This lack of proper input validation creates a scenario where an attacker can craft a malicious PCX file with carefully manipulated header values or pixel data that causes the application to write beyond the allocated memory boundaries. The vulnerability manifests as an out-of-bounds write condition that can overwrite adjacent memory locations, potentially corrupting critical application data structures, function pointers, or return addresses. According to CWE standards, this vulnerability maps to CWE-121, which describes stack-based buffer overflow conditions, and CWE-787, which addresses out-of-bounds write vulnerabilities.
The operational impact of this vulnerability extends beyond simple application instability, as it creates a pathway for remote code execution attacks. An attacker who successfully exploits this vulnerability can potentially gain complete control over the victim's system, as the out-of-bounds write can be manipulated to overwrite critical execution pointers or inject malicious code into the application's memory space. This makes the vulnerability particularly dangerous in environments where users might encounter untrusted PCX files through email attachments, web downloads, or file sharing platforms. The attack surface is broadened by the fact that PCX files are commonly used in graphic design workflows and can be encountered in various legitimate contexts, making user awareness of the threat difficult to maintain. The vulnerability aligns with ATT&CK technique T1059.007, which covers the execution of malicious code through the manipulation of application parsers, and T1203, which involves the exploitation of software vulnerabilities for privilege escalation.
Mitigation strategies for CVE-2018-3886 should focus on immediate remediation through vendor-provided patches and updates to the Photoline application. Organizations should implement strict file validation procedures for all incoming image files, particularly those from untrusted sources, and consider deploying sandboxing mechanisms to isolate image processing operations. Network-level controls such as content filtering and email scanning can help prevent the delivery of malicious PCX files to end users. Additionally, regular security assessments of image processing applications should be conducted to identify similar vulnerabilities in other software components. The vulnerability highlights the importance of input validation and memory safety practices in software development, emphasizing the need for robust bounds checking and proper error handling in file parsing routines. System administrators should also monitor for any signs of exploitation attempts and maintain comprehensive logging of file processing activities to detect potential attacks. The incident underscores the necessity of keeping software applications updated with the latest security patches, as this vulnerability was likely addressed in subsequent releases of the Photoline software.