CVE-2018-7639 : Exploit Details and Defense Strategies

A vulnerability has been found in CImg version 220, leading to a heap-based buffer over-read when loading a manipulated bmp image.

Understanding CVE-2018-7639

What is CVE-2018-7639?

This CVE identifies a specific vulnerability in the load_bmp function within CImg.h, affecting version 220 of CImg. The issue results in a heap-based buffer over-read when loading a manipulated bmp image, specifically in a scenario categorized as "16 bits colors" or case 16.

The Impact of CVE-2018-7639

The vulnerability allows attackers to exploit the heap-based buffer over-read, potentially leading to unauthorized access, data leakage, or system crashes.

Technical Details of CVE-2018-7639

Vulnerability Description

The vulnerability in CImg v.220 results in a heap-based buffer over-read in the load_bmp function when loading a crafted bmp image. It is distinct from CVE-2018-7588.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: Not applicable

Exploitation Mechanism

The vulnerability can be exploited by manipulating a bmp image, triggering the heap-based buffer over-read.

Mitigation and Prevention

Immediate Steps to Take

Update CImg to a patched version that addresses the vulnerability.
Avoid opening bmp images from untrusted or unknown sources.

Long-Term Security Practices

Regularly update software and libraries to mitigate known vulnerabilities.
Implement network security measures to detect and prevent potential attacks.

Patching and Updates

Apply security patches provided by CImg to fix the heap-based buffer over-read vulnerability.