CVE-2018-18457 : Vulnerability Insights and Analysis
Learn about CVE-2018-18457, a vulnerability in Xpdf 4.00 that allows remote attackers to trigger a denial of service by exploiting a specific function with a crafted pdf file. Find out how to mitigate and prevent this vulnerability.
A remote attacker can trigger a denial of service (NULL pointer dereference) in Xpdf 4.00 by exploiting the function DCTStream::readScan found in Stream.cc. This can be achieved by supplying a maliciously crafted pdf file, as demonstrated by the pdftoppm tool.
Understanding CVE-2018-18457
This CVE entry describes a vulnerability in Xpdf 4.00 that allows for a denial of service attack through a specific function.
What is CVE-2018-18457?
The vulnerability in Xpdf 4.00 enables a remote attacker to cause a denial of service by exploiting a particular function with a crafted pdf file.
The Impact of CVE-2018-18457
The exploitation of this vulnerability can lead to a denial of service condition, potentially disrupting the normal operation of the affected system.
Technical Details of CVE-2018-18457
Xpdf 4.00 vulnerability details and affected systems.
Vulnerability Description
The function DCTStream::readScan in Stream.cc in Xpdf 4.00 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted pdf file, as demonstrated by pdftoppm.
Affected Systems and Versions
- Product: N/A
- Vendor: N/A
- Version: N/A
Exploitation Mechanism
- Attackers exploit the function DCTStream::readScan in Xpdf 4.00 by providing a maliciously crafted pdf file.
Mitigation and Prevention
Protective measures and steps to mitigate the CVE-2018-18457 vulnerability.
Immediate Steps to Take
- Avoid opening or accessing untrusted or suspicious pdf files.
- Implement file type and content filtering mechanisms.
- Regularly update Xpdf software to the latest version.
Long-Term Security Practices
- Conduct regular security assessments and audits.
- Educate users on safe browsing habits and file handling procedures.
- Monitor network traffic for any suspicious activities.
- Employ intrusion detection and prevention systems.
- Keep abreast of security advisories and patches.
- Consider using alternative pdf readers if necessary.
Patching and Updates
- Apply patches and updates provided by Xpdf promptly to address the vulnerability.