CVE-2020-12672 : Vulnerability Insights and Analysis
Learn about CVE-2020-12672, a vulnerability in GraphicsMagick through 1.3.35 allowing a heap-based buffer overflow. Find out the impact, affected systems, exploitation details, and mitigation steps.
GraphicsMagick through 1.3.35 has a heap-based buffer overflow in ReadMNGImage in coders/png.c.
Understanding CVE-2020-12672
GraphicsMagick through version 1.3.35 is vulnerable to a heap-based buffer overflow in the ReadMNGImage function within the coders/png.c file.
What is CVE-2020-12672?
This CVE refers to a specific vulnerability in GraphicsMagick that allows attackers to trigger a heap-based buffer overflow by exploiting the ReadMNGImage function.
The Impact of CVE-2020-12672
The vulnerability could potentially lead to arbitrary code execution or denial of service if successfully exploited by a malicious actor.
Technical Details of CVE-2020-12672
GraphicsMagick through version 1.3.35 is susceptible to a heap-based buffer overflow due to improper input validation in the ReadMNGImage function.
Vulnerability Description
The vulnerability arises from a lack of proper bounds checking on user-controlled input, leading to a buffer overflow in the PNG image processing functionality.
Affected Systems and Versions
- Affected Version: GraphicsMagick through 1.3.35
- Systems running vulnerable versions of GraphicsMagick are at risk of exploitation.
Exploitation Mechanism
- Attackers can craft a malicious PNG image file to trigger the buffer overflow in the ReadMNGImage function, potentially leading to arbitrary code execution.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risks posed by CVE-2020-12672.
Immediate Steps to Take
- Update GraphicsMagick to a non-vulnerable version if available.
- Consider implementing network-level protections to filter out potentially malicious PNG files.
- Monitor for any unusual PNG file processing activities on the network.
Long-Term Security Practices
- Regularly update software and apply security patches promptly.
- Conduct security assessments and code reviews to identify and address vulnerabilities proactively.
Patching and Updates
- Stay informed about security advisories and updates from GraphicsMagick to apply patches as soon as they are released.