CVE-2021-28855 : What You Need to Know
Discover the impact of CVE-2021-28855, a vulnerability in Deark before 1.5.8 allowing a NULL pointer dereference in the dbuf_write function. Learn about affected systems and mitigation steps.
A vulnerability has been found in Deark before version 1.5.8 that allows a specially crafted input file to trigger a NULL pointer dereference in the dbuf_write function.
Understanding CVE-2021-28855
This CVE, identified as CVE-2021-28855, pertains to a vulnerability present in Deark versions prior to 1.5.8, enabling an attacker to exploit a NULL pointer dereference via a malicious input file.
What is CVE-2021-28855?
In Deark before version 1.5.8, a specific type of input file can lead to a NULL pointer dereference in the dbuf_write function located in src/deark-dbuf.c.
The Impact of CVE-2021-28855
The exploitation of this vulnerability could potentially result in a denial of service condition, leading to system crashes or other adverse effects.
Technical Details of CVE-2021-28855
This section covers a detailed insight into the vulnerability, its affected systems, and the exploitation mechanism.
Vulnerability Description
The issue in Deark before 1.5.8 allows an attacker to trigger a NULL pointer dereference through a specially crafted input file in the dbuf_write function.
Affected Systems and Versions
Deark versions earlier than 1.5.8 are affected by this vulnerability.
Exploitation Mechanism
An attacker can exploit this vulnerability by supplying a malicious input file that triggers the NULL pointer dereference in the dbuf_write function.
Mitigation and Prevention
To safeguard systems from potential exploitation of CVE-2021-28855, immediate measures and long-term security practices are crucial.
Immediate Steps to Take
Users are advised to update Deark to version 1.5.8 or later to mitigate the risks associated with this vulnerability.
Long-Term Security Practices
Implementing secure coding practices, performing regular security audits, and staying informed about patches and updates are recommended for enhanced system security.
Patching and Updates
Regularly check for security advisories from Deark and apply patches promptly to address known vulnerabilities.