CVE-2017-16353 : Security Advisory and Response

GraphicsMagick version 1.3.26 is affected by a memory information disclosure vulnerability in the DescribeImage function, leading to a heap-based buffer over-read. This vulnerability allows an attacker to trigger an out-of-bounds buffer dereference by exploiting a specially crafted MIFF file.

Understanding CVE-2017-16353

This CVE entry highlights a critical vulnerability in GraphicsMagick version 1.3.26 that can result in a memory information disclosure.

What is CVE-2017-16353?

The vulnerability is located in the DescribeImage function of the magick/describe.c file within GraphicsMagick. It arises due to a lack of checks for certain increments, enabling a heap-based buffer over-read. Attackers can exploit this issue by using a specifically crafted MIFF file to trigger the vulnerability.

The Impact of CVE-2017-16353

Exploitation of this vulnerability can lead to a memory information disclosure, potentially exposing sensitive data stored within the image. The out-of-bounds buffer dereference can be leveraged by malicious actors to compromise the integrity and confidentiality of the affected system.

Technical Details of CVE-2017-16353

This section delves into the technical aspects of the CVE, providing insights into the vulnerability's description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in GraphicsMagick version 1.3.26 allows for a memory information disclosure due to a heap-based buffer over-read in the DescribeImage function. Specifically, the issue lies in the code responsible for displaying the IPTC Profile information stored within the image.

Affected Systems and Versions

Affected Version: 1.3.26
Systems: GraphicsMagick

Exploitation Mechanism

The vulnerability can be exploited through the use of a specially crafted MIFF file. By manipulating certain increments and triggering the DescribeImage function, attackers can cause an out-of-bounds buffer dereference, leading to a memory information disclosure.

Mitigation and Prevention

Protecting systems from CVE-2017-16353 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update GraphicsMagick to a non-vulnerable version if available.
Implement file input validation to prevent the processing of malicious MIFF files.
Monitor system logs for any suspicious activities that could indicate exploitation attempts.

Long-Term Security Practices

Conduct regular security assessments and code reviews to identify and address vulnerabilities promptly.
Educate users on safe file handling practices to minimize the risk of executing malicious files.
Stay informed about security advisories and updates related to GraphicsMagick.

Patching and Updates

Apply patches provided by GraphicsMagick promptly to address the vulnerability and enhance system security.