CVE-2021-43579 : Exploit Details and Defense Strategies
Learn about CVE-2021-43579, a stack-based buffer overflow in HTMLDOC <= 1.9.13 enabling remote code execution. Find mitigation steps and update information here.
HTMLDOC <= 1.9.13 is vulnerable to a stack-based buffer overflow in image_load_bmp() leading to remote code execution.
Understanding CVE-2021-43579
What is CVE-2021-43579?
A stack-based buffer overflow in image_load_bmp() in HTMLDOC <= 1.9.13 results in remote code execution if the victim converts an HTML document linking to a crafted BMP file.
The Impact of CVE-2021-43579
This vulnerability allows for remote code execution, posing a severe threat to systems where the affected HTMLDOC versions are in use.
Technical Details of CVE-2021-43579
Vulnerability Description
The stack-based buffer overflow in image_load_bmp() in HTMLDOC <= 1.9.13 allows attackers to execute malicious code remotely.
Affected Systems and Versions
- Product: HTMLDOC
- Vendor: N/A
- Versions: All versions <= 1.9.13
Exploitation Mechanism
By manipulating BMP files within HTML documents, attackers can trigger the stack-based buffer overflow, leading to remote code execution.
Mitigation and Prevention
Immediate Steps to Take
- Update HTMLDOC to version 1.9.14 or higher.
- Avoid converting HTML documents linking to untrusted or crafted BMP files.
Long-Term Security Practices
- Regularly update software and dependencies to patch known vulnerabilities.
- Implement network-level security measures to detect and prevent malicious activities.
Patching and Updates
Ensure timely application of security patches and stay informed about security updates for HTMLDOC.