CVE-2020-21890 : What You Need to Know
Learn about CVE-2020-21890, a Buffer Overflow vulnerability in Artifex Ghostscript 9.50 that allows remote attackers to cause denial of service or other impacts via a crafted PDF document. Find mitigation steps and prevention measures here.
Artifex Ghostscript 9.50 is affected by a Buffer Overflow vulnerability in the clj_media_size function, allowing remote attackers to cause denial of service or other impacts by opening a crafted PDF document.
Understanding CVE-2020-21890
This CVE identifies a specific vulnerability in Artifex Ghostscript 9.50 that can be exploited by attackers through a crafted PDF document.
What is CVE-2020-21890?
The CVE-2020-21890 vulnerability is a Buffer Overflow issue in the clj_media_size function of Artifex Ghostscript 9.50, enabling remote attackers to disrupt services or cause other unspecified impacts by manipulating a PDF file.
The Impact of CVE-2020-21890
The vulnerability can lead to a denial of service or other adverse effects when a maliciously crafted PDF document is opened using the affected Ghostscript version.
Technical Details of CVE-2020-21890
Artifex Ghostscript 9.50 is susceptible to a Buffer Overflow vulnerability in the clj_media_size function.
Vulnerability Description
The vulnerability allows remote attackers to exploit the clj_media_size function, potentially leading to a denial of service or other unspecified impacts.
Affected Systems and Versions
- Vendor: n/a
- Product: n/a
- Versions: All versions are affected
Exploitation Mechanism
Attackers can exploit this vulnerability by enticing a user to open a specially crafted PDF document, triggering the Buffer Overflow in the clj_media_size function.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risks posed by CVE-2020-21890.
Immediate Steps to Take
- Update Artifex Ghostscript to the latest patched version.
- Avoid opening PDF files from untrusted or unknown sources.
- Implement network security measures to detect and block malicious PDF files.
Long-Term Security Practices
- Regularly update software and apply security patches promptly.
- Conduct security training to educate users on identifying and handling suspicious files.
Patching and Updates
- Check for security advisories from Artifex and apply recommended patches to address the vulnerability.