CVE-2018-18456 Explained : Impact and Mitigation
Learn about CVE-2018-18456, a vulnerability in Xpdf 4.00 that allows remote attackers to exploit a denial of service issue via a crafted pdf file. Understand the impact, technical details, and mitigation steps.
Xpdf 4.00 has a vulnerability that allows remote attackers to exploit a denial of service issue by using a crafted pdf file. The vulnerability is triggered in the Object::isName() function, leading to a stack-based buffer over-read.
Understanding CVE-2018-18456
This CVE entry details a specific vulnerability in Xpdf 4.00 that can be exploited remotely to cause a denial of service.
What is CVE-2018-18456?
The vulnerability in Xpdf 4.00 allows attackers to disrupt system operations by triggering a stack-based buffer over-read through a crafted pdf file. The issue lies in the Object::isName() function.
The Impact of CVE-2018-18456
The vulnerability can be exploited remotely, potentially leading to a denial of service attack. Attackers can disrupt system functionality by exploiting this issue.
Technical Details of CVE-2018-18456
Xpdf 4.00 vulnerability technical specifics.
Vulnerability Description
The vulnerability in Xpdf 4.00 is caused by a stack-based buffer over-read triggered in the Object::isName() function when called from Gfx::opSetFillColorN. This allows remote attackers to exploit the system using a crafted pdf file.
Affected Systems and Versions
- Product: Xpdf 4.00
- Vendor: N/A
- Versions: N/A
Exploitation Mechanism
The vulnerability is exploited by utilizing a crafted pdf file to trigger the Object::isName() function, leading to a stack-based buffer over-read.
Mitigation and Prevention
Protecting systems from CVE-2018-18456.
Immediate Steps to Take
- Avoid opening pdf files from untrusted sources.
- Implement network-level protections to filter out potentially malicious pdf files.
- Monitor system logs for any unusual activities related to pdf file processing.
Long-Term Security Practices
- Keep software and applications updated to mitigate known vulnerabilities.
- Conduct regular security assessments and penetration testing to identify and address potential weaknesses.
- Educate users on safe browsing habits and the risks associated with opening files from unknown sources.
Patching and Updates
Stay informed about security patches and updates released by Xpdf to address the vulnerability in version 4.00.