CVE-2019-14443 : Security Advisory and Response
Discover the CVE-2019-14443 vulnerability in Libav 12.3, allowing remote attackers to crash the application by exploiting a division by zero issue. Learn about the impact, technical details, and mitigation steps.
Libav 12.3 has a vulnerability that allows remote attackers to cause a denial of service by exploiting a division by zero issue in the function range_decode_culshift in libavcodec/apedec.c.
Understanding CVE-2019-14443
This CVE entry describes a specific vulnerability in Libav 12.3 that can be exploited by attackers to crash the application.
What is CVE-2019-14443?
CVE-2019-14443 is a vulnerability in Libav 12.3 that stems from a division by zero issue in the range_decode_culshift function within the file libavcodec/apedec.c. This vulnerability can be exploited remotely by attackers to crash the application, as demonstrated by the avconv tool.
The Impact of CVE-2019-14443
The impact of this vulnerability is the potential for remote attackers to cause a denial of service by crashing the application.
Technical Details of CVE-2019-14443
This section provides more technical insights into the CVE-2019-14443 vulnerability.
Vulnerability Description
The vulnerability in Libav 12.3 arises from a division by zero issue in the range_decode_culshift function in libavcodec/apedec.c, allowing remote attackers to crash the application.
Affected Systems and Versions
- Affected Version: Libav 12.3
- Systems: Not specified
Exploitation Mechanism
The vulnerability can be exploited remotely by attackers to trigger a denial of service by causing the application to crash.
Mitigation and Prevention
To address CVE-2019-14443 and enhance security, the following steps can be taken:
Immediate Steps to Take
- Apply the security update provided by Libav to patch the vulnerability.
- Monitor for any unusual application crashes that could indicate exploitation.
Long-Term Security Practices
- Regularly update software and libraries to ensure the latest security patches are in place.
- Implement network security measures to prevent remote exploitation of vulnerabilities.
Patching and Updates
- Stay informed about security updates from Libav and promptly apply patches to mitigate known vulnerabilities.