CVE-2020-27770 : What You Need to Know

CVE-2020-27770 is a vulnerability in ImageMagick that could lead to application availability issues due to a missing check for 0 value of

replace_extent

, potentially causing an overflow in SubstituteString() when processing crafted input files.

Understanding CVE-2020-27770

This section provides insights into the nature and impact of the CVE-2020-27770 vulnerability.

What is CVE-2020-27770?

The CVE-2020-27770 vulnerability in ImageMagick versions prior to 7.0.8-68 arises from a missing check for 0 value of

replace_extent

, which can result in an offset

p

overflow in SubstituteString(), posing a risk to application availability.

The Impact of CVE-2020-27770

The vulnerability could be exploited by processing malicious input files, potentially leading to application unavailability or disruption.

Technical Details of CVE-2020-27770

Explore the technical aspects of the CVE-2020-27770 vulnerability.

Vulnerability Description

The flaw in ImageMagick versions prior to 7.0.8-68 allows for an overflow in SubstituteString() due to a missing check for 0 value of

replace_extent

.

Affected Systems and Versions

Vendor: n/a
Product: ImageMagick
Affected Version: ImageMagick 7.0.8-68

Exploitation Mechanism

Crafted input files processed by ImageMagick can trigger the vulnerability, potentially leading to an overflow in SubstituteString().

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2020-27770.

Immediate Steps to Take

Update ImageMagick to version 7.0.8-68 or later to address the vulnerability.
Avoid processing untrusted or unknown image files.

Long-Term Security Practices

Regularly update software and libraries to the latest versions.
Implement input validation mechanisms to prevent malicious file execution.

Patching and Updates

Apply security patches and updates provided by ImageMagick to ensure protection against known vulnerabilities.