CVE-2018-20845 : What You Need to Know

OpenJPEG version 2.3.0 and below contain vulnerabilities that can lead to a denial of service attack due to division-by-zero issues.

Understanding CVE-2018-20845

The functions pi_next_pcrl, pi_next_cprl, and pi_next_rpcl in OpenJPEG version 2.3.0 and below are susceptible to exploitation.

What is CVE-2018-20845?

These vulnerabilities in OpenJPEG allow remote attackers to trigger a denial of service, causing the affected application to crash.

The Impact of CVE-2018-20845

Exploitation of these vulnerabilities can result in a denial of service attack, disrupting the normal operation of the application.

Technical Details of CVE-2018-20845

OpenJPEG version 2.3.0 and below are affected by this vulnerability.

Vulnerability Description

The vulnerabilities in the functions pi_next_pcrl, pi_next_cprl, and pi_next_rpcl in OpenJPEG version 2.3.0 and below are related to division-by-zero, enabling remote attackers to cause a denial of service.

Affected Systems and Versions

OpenJPEG version 2.3.0 and below

Exploitation Mechanism

Remote attackers can exploit these vulnerabilities to trigger a denial of service, leading to a crash of the affected application.

Mitigation and Prevention

Steps to address and prevent the CVE-2018-20845 vulnerability.

Immediate Steps to Take

Update OpenJPEG to a version that includes a patch for the division-by-zero vulnerabilities.
Monitor for any unusual activity that could indicate an ongoing attack.

Long-Term Security Practices

Regularly update software and apply security patches to prevent known vulnerabilities.
Implement network security measures to detect and block malicious traffic.

Patching and Updates

Stay informed about security updates for OpenJPEG and promptly apply patches to mitigate the risk of exploitation.