CVE-2018-18583 in LuPng
Summary
by MITRE
An issue has been found in LuPng through 2017-03-10. It is a heap-based buffer overflow in insertByte in miniz/lupng.c during a write operation for data obtained from a swap.
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Analysis
by VulDB Data Team • 04/06/2020
The vulnerability identified as CVE-2018-18583 represents a critical heap-based buffer overflow within the LuPng library version 2017-03-10 and earlier. This flaw exists in the insertByte function located within the miniz/lupng.c source file, where improper memory handling during write operations creates exploitable conditions that can lead to arbitrary code execution or system compromise. The vulnerability specifically manifests when processing data obtained from a swap operation, indicating that the issue is triggered by specific memory management patterns during image processing workflows.
The technical implementation of this vulnerability stems from inadequate bounds checking within the insertByte function, which fails to validate the size of data being written to heap-allocated memory regions. When the library processes image data that has been swapped or relocated in memory, the insufficient validation allows maliciously crafted input to overwrite adjacent heap memory blocks. This type of vulnerability falls under CWE-121 heap-based buffer overflow, where the attacker can manipulate memory layout to achieve code execution or information disclosure. The heap corruption occurs during write operations, making it particularly dangerous as it can be exploited through carefully crafted image files that trigger the vulnerable code path during normal library operation.
The operational impact of CVE-2018-18583 extends beyond simple denial of service scenarios, as it provides potential attackers with pathways for privilege escalation and remote code execution. Systems utilizing LuPng for image processing, including web applications, image editing software, and content management systems, become vulnerable to exploitation when processing untrusted image data. The vulnerability's exploitation potential aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation could enable attackers to execute arbitrary commands on affected systems. Additionally, the vulnerability's nature suggests it could be leveraged for information disclosure through heap memory corruption, potentially exposing sensitive data or system state information.
Mitigation strategies for this vulnerability should prioritize immediate patching of the LuPng library to version 2017-03-11 or later, which contains the necessary memory bounds checking fixes. Organizations should implement input validation controls at multiple layers, including image file format validation and size limitation for processing operations. Network segmentation and application sandboxing can help limit the potential impact of successful exploitation attempts. Security monitoring should focus on detecting unusual memory allocation patterns and heap corruption indicators during image processing operations. The vulnerability also highlights the importance of regular security assessments and dependency updates, as it demonstrates how seemingly minor memory handling flaws can create significant security risks in widely-used libraries. System administrators should also consider implementing automated patch management processes to ensure timely remediation of similar vulnerabilities across their infrastructure.