CVE-2018-18458 : Security Advisory and Response
CVE-2018-18458 allows remote attackers to trigger a denial of service in Xpdf 4.00 via a crafted PDF file. Learn about the impact, affected systems, exploitation, and mitigation steps.
A vulnerability found in the function DCTStream::decodeImage in the Stream.cc file of Xpdf 4.00 software can be exploited by remote attackers to trigger a denial of service (NULL pointer dereference) using a specially crafted PDF file.
Understanding CVE-2018-18458
What is CVE-2018-18458?
The vulnerability in Xpdf 4.00 allows remote attackers to cause a denial of service by exploiting a NULL pointer dereference through a crafted PDF file.
The Impact of CVE-2018-18458
This vulnerability can be exploited by remote attackers to trigger a denial of service, potentially disrupting the availability of the affected system.
Technical Details of CVE-2018-18458
Vulnerability Description
The vulnerability exists in the function DCTStream::decodeImage in the Stream.cc file of Xpdf 4.00, enabling remote attackers to exploit a NULL pointer dereference.
Affected Systems and Versions
- Product: Xpdf 4.00
- Vendor: N/A
- Versions: N/A
Exploitation Mechanism
Remote attackers can exploit this vulnerability by using a specially crafted PDF file, as demonstrated by the pdftoppm tool.
Mitigation and Prevention
Immediate Steps to Take
- Apply security patches provided by the software vendor promptly.
- Avoid opening PDF files from untrusted or unknown sources.
- Implement network security measures to prevent unauthorized access.
Long-Term Security Practices
- Regularly update software and applications to mitigate known vulnerabilities.
- Conduct security training for users to recognize and report suspicious activities.
Patching and Updates
Ensure that Xpdf software is updated to the latest version to address and mitigate the vulnerability.