CVE-2017-16794 : Exploit Details and Defense Strategies

SWFTools version 0.9.2 has a vulnerability in the png_load function located in lib/png.c, allowing remote attackers to cause a denial of service and crash the application.

Understanding CVE-2017-16794

This CVE involves a vulnerability in SWFTools version 0.9.2 that can be exploited remotely, leading to a denial of service.

What is CVE-2017-16794?

The vulnerability in the png_load function of SWFTools 0.9.2 arises from improper validation of a multiplication operation involving width and bits-per-pixel values. Attackers can exploit this by providing a specially crafted file, resulting in a denial of service and a heap-based buffer over-read.

The Impact of CVE-2017-16794

Attackers can remotely exploit the vulnerability in SWFTools 0.9.2 to cause a denial of service and crash the application.
The exploitation occurs through a specially crafted file, triggering a heap-based buffer over-read.

Technical Details of CVE-2017-16794

SWFTools version 0.9.2 is affected by a vulnerability in the png_load function, leading to a denial of service.

Vulnerability Description

The vulnerability is caused by improper validation of a multiplication operation involving width and bits-per-pixel values in SWFTools 0.9.2.

Affected Systems and Versions

Product: SWFTools
Vendor: N/A
Version: 0.9.2

Exploitation Mechanism

Attackers exploit the vulnerability remotely by supplying a specially crafted file.
This triggers a denial of service, causing a heap-based buffer over-read and crashing the application.

Mitigation and Prevention

To address CVE-2017-16794, follow these steps:

Immediate Steps to Take

Update SWFTools to a patched version.
Avoid opening untrusted SWF files.

Long-Term Security Practices

Regularly update software to the latest versions.
Implement network security measures to prevent remote exploitation.

Patching and Updates

Apply patches provided by SWFTools to fix the vulnerability.