CVE-2019-17546 Explained : Impact and Mitigation

A vulnerability in LibTIFF and GDAL software versions up to specific versions can lead to a heap-based buffer overflow due to an integer overflow. This issue arises when processing specially crafted RGBA images.

Understanding CVE-2019-17546

This CVE identifies a critical vulnerability in LibTIFF and GDAL software that can be exploited through a crafted image, potentially leading to a heap-based buffer overflow.

What is CVE-2019-17546?

CVE-2019-17546 is a vulnerability present in the tif_getimage.c file within LibTIFF up to version 4.0.10 and GDAL up to version 3.0.1. The flaw is triggered by an integer overflow, resulting in a potential heap-based buffer overflow when processing specific RGBA images.

The Impact of CVE-2019-17546

The vulnerability allows attackers to execute arbitrary code or cause a denial of service by exploiting the heap-based buffer overflow. This could compromise the integrity and availability of affected systems.

Technical Details of CVE-2019-17546

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability in LibTIFF and GDAL is caused by an integer overflow, leading to a potential heap-based buffer overflow when processing specially crafted RGBA images.

Affected Systems and Versions

LibTIFF up to version 4.0.10
GDAL up to version 3.0.1

Exploitation Mechanism

The vulnerability is exploited by processing malicious RGBA images, triggering the integer overflow and subsequent heap-based buffer overflow.

Mitigation and Prevention

Protecting systems from CVE-2019-17546 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the software vendors promptly.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update software and firmware to mitigate known vulnerabilities.
Conduct security training for employees to raise awareness of potential threats.
Employ intrusion detection and prevention systems to enhance network security.

Patching and Updates

Update LibTIFF to version 4.0.11 or later.
Update GDAL to version 3.0.2 or later.