CVE-2020-27845 : What You Need to Know

A vulnerability in openjpeg versions prior to 2.4.0 could allow an attacker to trigger an out-of-bounds read, impacting application availability.

Understanding CVE-2020-27845

This CVE involves a flaw in openjpeg that could be exploited to cause an out-of-bounds read.

What is CVE-2020-27845?

The vulnerability exists in src/lib/openjp2/pi.c of openjpeg versions before 2.4.0, enabling attackers to exploit the conversion/encoding functionality with untrusted input.

The Impact of CVE-2020-27845

The highest impact of this vulnerability is on application availability due to the potential out-of-bounds read.

Technical Details of CVE-2020-27845

This section provides more technical insights into the CVE.

Vulnerability Description

The flaw in openjpeg versions prior to 2.4.0 allows attackers to trigger an out-of-bounds read by providing untrusted input to the conversion/encoding functionality.

Affected Systems and Versions

Product: openjpeg
Vendor: n/a
Versions Affected: openjpeg 2.4.0

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating untrusted input in openjpeg's conversion/encoding functionality.

Mitigation and Prevention

Protecting systems from CVE-2020-27845 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update openjpeg to version 2.4.0 or later to mitigate the vulnerability.
Implement input validation mechanisms to prevent untrusted input exploitation.

Long-Term Security Practices

Regularly monitor and patch software for known vulnerabilities.
Conduct security assessments and audits to identify and address potential weaknesses.

Patching and Updates

Apply security patches promptly to ensure systems are protected against known vulnerabilities.