CVE-2018-20189 : Exploit Details and Defense Strategies
Learn about CVE-2018-20189, a vulnerability in GraphicsMagick version 1.3.31 that allows a denial of service attack via a crafted dib file. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A vulnerability has been discovered in the ReadDIBImage function of coders/dib.c in GraphicsMagick version 1.3.31. This vulnerability can be exploited by a crafted dib file that appears with direct pixel values and colormapping, leading to a crash and denial of service.
Understanding CVE-2018-20189
This CVE entry describes a vulnerability in GraphicsMagick version 1.3.31 that allows for a denial of service attack through a specially crafted dib file.
What is CVE-2018-20189?
In GraphicsMagick 1.3.31, the ReadDIBImage function of coders/dib.c has a vulnerability that can be triggered by a crafted dib file with direct pixel values and colormapping, causing a crash and denial of service.
The Impact of CVE-2018-20189
The vulnerability in GraphicsMagick version 1.3.31 can lead to a crash and denial of service when exploited by a maliciously crafted dib file.
Technical Details of CVE-2018-20189
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability in GraphicsMagick version 1.3.31 arises from the ReadDIBImage function in coders/dib.c, allowing for a crash and denial of service via a crafted dib file with specific characteristics.
Affected Systems and Versions
- Affected Version: GraphicsMagick 1.3.31
- Systems: All systems running GraphicsMagick 1.3.31
Exploitation Mechanism
The vulnerability can be exploited by creating a specially crafted dib file with direct pixel values and colormapping, which triggers the crash and denial of service.
Mitigation and Prevention
Protecting systems from CVE-2018-20189 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update GraphicsMagick to a patched version that addresses the vulnerability.
- Avoid opening dib files from untrusted or unknown sources.
Long-Term Security Practices
- Regularly update software and apply security patches promptly.
- Implement file type and content validation mechanisms to detect malicious files.
Patching and Updates
Ensure that GraphicsMagick is regularly updated to the latest version to mitigate the risk of exploitation.