CVE-2020-27841 Explained : Impact and Mitigation

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-2020-27841

This CVE involves a flaw in openjpeg that could be exploited by providing crafted input to the openjpeg encoder.

What is CVE-2020-27841?

The vulnerability in openjpeg versions before 2.4.0 allows for an out-of-bounds read in src/lib/openjp2/pi.c when processing specially crafted input.

The Impact of CVE-2020-27841

The primary consequence of this vulnerability is the potential compromise of application availability due to the out-of-bounds read.

Technical Details of CVE-2020-27841

This section provides more technical insights into the CVE.

Vulnerability Description

The flaw in openjpeg versions prior to 2.4.0 enables an attacker to trigger an out-of-bounds read by providing malicious input to the openjpeg encoder.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability can be exploited by supplying specially crafted input to the openjpeg encoder, leading to an out-of-bounds read.

Mitigation and Prevention

Protecting systems from CVE-2020-27841 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update openjpeg to version 2.4.0 or later to mitigate the vulnerability.
Monitor vendor advisories for patches and security updates.

Long-Term Security Practices

Implement input validation mechanisms to prevent crafted input exploitation.
Regularly scan and audit systems for vulnerabilities.

Patching and Updates

Apply patches and updates provided by the openjpeg vendor to address the vulnerability.