CVE-2020-16293 : Security Advisory and Response
Learn about CVE-2020-16293, a null pointer dereference vulnerability in Artifex Software GhostScript v9.50 that allows remote attackers to cause denial of service via crafted PDF files. Find mitigation steps and update recommendations here.
A null pointer dereference vulnerability in compose_group_nonknockout_nonblend_isolated_allmask_common() in Artifex Software GhostScript v9.50 allows a remote attacker to cause a denial of service via a crafted PDF file.
Understanding CVE-2020-16293
This CVE involves a vulnerability in GhostScript v9.50 that could lead to a denial of service attack.
What is CVE-2020-16293?
CVE-2020-16293 is a null pointer dereference vulnerability in the base/gxblend.c file of Artifex Software GhostScript v9.50.
The Impact of CVE-2020-16293
The vulnerability allows a remote attacker to exploit it using a specially crafted PDF file, resulting in a denial of service.
Technical Details of CVE-2020-16293
This section provides more technical insights into the CVE.
Vulnerability Description
The vulnerability exists in the compose_group_nonknockout_nonblend_isolated_allmask_common() function in GhostScript v9.50.
Affected Systems and Versions
- Product: Artifex Software GhostScript
- Version: 9.50
Exploitation Mechanism
The vulnerability can be exploited by a remote attacker through a maliciously crafted PDF file.
Mitigation and Prevention
Protecting systems from CVE-2020-16293 is crucial to prevent denial of service attacks.
Immediate Steps to Take
- Update GhostScript to version 9.51, where the vulnerability is fixed.
- Be cautious when opening PDF files from untrusted sources.
Long-Term Security Practices
- Regularly update software and apply security patches promptly.
- Implement network security measures to detect and block malicious PDF files.
Patching and Updates
Ensure that all systems running GhostScript are updated to version 9.51 to mitigate the vulnerability.