CVE-2023-3745 : What You Need to Know

This CVE-2023-3745 involves a heap-based buffer overflow vulnerability in the PushCharPixel() function within quantum-private.h of ImageMagick. This vulnerability could potentially be exploited by a local attacker to trigger an out-of-bounds read error, leading to application crashes and denial of service.

Understanding CVE-2023-3745

This section delves into the details of the CVE-2023-3745 vulnerability concerning ImageMagick.

What is CVE-2023-3745?

The CVE-2023-3745 vulnerability is a heap-based buffer overflow issue found in ImageMagick's PushCharPixel() function in quantum-private.h. This flaw could be leveraged by a local attacker to manipulate a user into opening a specially crafted file, causing an out-of-bounds read error that can result in application crashes and denial of service.

The Impact of CVE-2023-3745

The impact of CVE-2023-3745 can lead to system instability, application crashes, and denial of service if exploited by a malicious actor. It poses a significant risk to systems running affected versions of ImageMagick.

Technical Details of CVE-2023-3745

In this section, we delve into the technical aspects of the CVE-2023-3745 vulnerability.

Vulnerability Description

The vulnerability stems from a heap-based buffer overflow in the PushCharPixel() function within quantum-private.h of ImageMagick. This flaw can be exploited locally to provoke an out-of-bounds read error, leading to application crashes.

Affected Systems and Versions

Product: ImageMagick6

Version: 6.9.11-0
Status: Unaffected

Product: ImageMagick

Version: 7.0.10-0
Status: Unaffected

Red Hat Enterprise Linux 6

Version: ImageMagick
Collection URL: Red Hat Package Browser
Default Status: Unknown
CPE: cpe:/o:redhat:enterprise_linux:6

Red Hat Enterprise Linux 7

Version: ImageMagick
Collection URL: Red Hat Package Browser
Default Status: Unknown
CPE: cpe:/o:redhat:enterprise_linux:7

Extra Packages for Enterprise Linux 8 (Fedora)

Version: ImageMagick
Collection URL: Fedora Package Repository
Default Status: Unaffected

Fedora 37 (Fedora)

Version: ImageMagick
Collection URL: Fedora Package Repository
Default Status: Unaffected

Fedora 38 (Fedora)

Version: ImageMagick
Collection URL: Fedora Package Repository
Default Status: Unaffected

Exploitation Mechanism

The vulnerability can be exploited locally by enticing a user to open a specially crafted file containing malicious payloads that trigger the heap-based buffer overflow in the PushCharPixel() function of ImageMagick.

Mitigation and Prevention

In this section, we outline steps to mitigate and prevent the exploitation of CVE-2023-3745.

Immediate Steps to Take

Users are advised to update ImageMagick to the latest version available.
Exercise caution when opening files from unknown or untrusted sources.

Long-Term Security Practices

Regularly update software and ensure security patches are applied promptly.
Employ network security measures to monitor and detect suspicious activity.

Patching and Updates

Check for patches and updates from Red Hat or ImageMagick's official sources to address the CVE-2023-3745 vulnerability.