CVE-2018-3888 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.
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Analysis
by VulDB Data Team • 02/27/2023
The vulnerability identified as CVE-2018-3888 represents a critical memory corruption flaw within Computerinsel Photoline version 20.53 that specifically affects the PCX file format parsing functionality. This issue stems from inadequate input validation and memory management during the processing of PCX images, creating a pathway for malicious actors to exploit the application's handling of malformed image data. The vulnerability is particularly concerning as it exists within a widely used image editing software that processes various graphic formats, making it a potential target for attackers seeking to compromise systems through social engineering or malicious file delivery methods.
The technical nature of this vulnerability manifests as an out-of-bounds write condition that occurs when the Photoline application processes specially crafted PCX files. This memory corruption vulnerability allows an attacker to overwrite arbitrary data in memory, potentially leading to arbitrary code execution within the context of the running application. The flaw demonstrates characteristics consistent with CWE-121, which describes heap-based buffer overflow conditions, and aligns with ATT&CK technique T1059.007 for command and scripting interpreter. The root cause lies in the application's failure to properly validate the dimensions and structure of PCX image headers, enabling attackers to manipulate memory layout through carefully constructed file parameters that exceed expected buffer boundaries.
The operational impact of CVE-2018-3888 extends beyond simple denial of service scenarios, as it provides attackers with the capability to achieve remote code execution within the target system. When a user opens a maliciously crafted PCX file within Photoline, the application's parsing routine triggers the memory corruption, potentially allowing an attacker to execute arbitrary code with the privileges of the affected user. This vulnerability can be exploited through various delivery mechanisms including email attachments, web downloads, or file sharing platforms, making it particularly dangerous in enterprise environments where users may inadvertently open malicious files. The attack surface is further expanded due to the application's widespread use in professional graphic design and publishing workflows, where users often process files from untrusted sources.
Mitigation strategies for this vulnerability should focus on immediate patching of the affected Photoline version, as well as implementing defensive measures such as restricting file type processing and deploying application whitelisting controls. Organizations should consider implementing sandboxing mechanisms for image processing operations and establishing strict file validation procedures before opening any image files. Network-based defenses can include content filtering solutions that scan for suspicious file characteristics and block potentially malicious PCX files from entering the network. Additionally, regular security awareness training for users can help reduce the risk of successful exploitation through social engineering attacks that rely on users opening malicious attachments. The vulnerability highlights the importance of proper input validation and memory management practices, aligning with security frameworks such as the OWASP Top Ten and NIST Cybersecurity Framework, which emphasize the need for robust software security practices throughout the development lifecycle.