CVE-2018-20199 : Exploit Details and Defense Strategies

An issue was found in libfaad/filtbank.c within the Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.8, leading to a NULL pointer dereference in ifilter_bank, resulting in a segmentation fault and denial of service due to mishandling of adding to the windowed output.

Understanding CVE-2018-20199

This CVE involves a vulnerability in FAAD2 that can lead to a denial of service attack.

What is CVE-2018-20199?

A NULL pointer dereference in ifilter_bank of libfaad/filtbank.c in FAAD2 2.8.8 causes a segmentation fault and application crash, resulting in denial of service due to mishandling of adding to the windowed output.

The Impact of CVE-2018-20199

The vulnerability can lead to a denial of service attack by causing a segmentation fault and application crash.

Technical Details of CVE-2018-20199

This section provides technical details about the CVE.

Vulnerability Description

The issue involves a NULL pointer dereference in ifilter_bank of libfaad/filtbank.c in FAAD2 2.8.8.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Version: 2.8.8

Exploitation Mechanism

The vulnerability can be exploited to trigger a segmentation fault and subsequent application crash, leading to denial of service.

Mitigation and Prevention

Here are the steps to mitigate and prevent exploitation of CVE-2018-20199.

Immediate Steps to Take

Apply patches or updates provided by the software vendor.
Monitor security advisories for any new information or updates.

Long-Term Security Practices

Regularly update software and systems to the latest versions.
Implement proper input validation and error handling mechanisms.
Conduct regular security assessments and penetration testing.

Patching and Updates

Ensure that the FAAD2 software is updated to a version that addresses the NULL pointer dereference vulnerability.