CVE-2018-18828 : Security Advisory and Response
Learn about CVE-2018-18828, a vulnerability in Libav version 12.3 that allows attackers to trigger a denial-of-service condition via a crafted aac file. Find out the impact, affected systems, exploitation method, and mitigation steps.
A vulnerability has been identified in Libav version 12.3, leading to a denial-of-service condition due to a heap-based buffer overflow in the vc1_block.c file within the vc1_decode_i_block_adv function when processing a specially crafted aac file.
Understanding CVE-2018-18828
This CVE involves a specific vulnerability in Libav version 12.3 that can be exploited by attackers through a crafted aac file, potentially resulting in a denial-of-service.
What is CVE-2018-18828?
The vulnerability in Libav version 12.3 allows attackers to trigger a heap-based buffer overflow in the vc1_block.c file, leading to a denial-of-service condition when processing a specially crafted aac file.
The Impact of CVE-2018-18828
The exploitation of this vulnerability can result in a denial-of-service condition, potentially disrupting the normal operation of the affected system.
Technical Details of CVE-2018-18828
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability exists in the vc1_decode_i_block_adv function in the vc1_block.c file of Libav version 12.3, allowing attackers to exploit a heap-based buffer overflow.
Affected Systems and Versions
- Affected Version: Libav 12.3
- Systems running this specific version are vulnerable to the heap-based buffer overflow.
Exploitation Mechanism
- Attackers can exploit this vulnerability by providing a specially crafted aac file to trigger the heap-based buffer overflow in the vc1_decode_i_block_adv function.
Mitigation and Prevention
To address CVE-2018-18828, consider the following mitigation strategies:
Immediate Steps to Take
- Update Libav to a patched version that addresses the heap-based buffer overflow.
- Avoid opening or processing untrusted aac files to mitigate the risk of exploitation.
Long-Term Security Practices
- Implement regular security updates and patches for all software components to prevent vulnerabilities.
- Conduct security assessments and code reviews to identify and address potential weaknesses.
Patching and Updates
- Stay informed about security advisories related to Libav and promptly apply patches released by the vendor to mitigate known vulnerabilities.