CVE-2019-19721 Explained : Impact and Mitigation
Learn about CVE-2019-19721, an off-by-one error vulnerability in VideoLAN VLC media player versions 3.0.8 and earlier. Discover the impact, affected systems, exploitation method, and mitigation steps.
VideoLAN VLC media player version 3.0.8 and earlier is vulnerable to an off-by-one error in the DecodeBlock function in codec/sdl_image.c. This vulnerability can be exploited by remote attackers using a manipulated image file to cause a denial of service condition and memory corruption.
Understanding CVE-2019-19721
This CVE identifies a specific vulnerability in VideoLAN VLC media player versions 3.0.8 and earlier.
What is CVE-2019-19721?
An off-by-one error in the DecodeBlock function in codec/sdl_image.c in VideoLAN VLC media player version 3.0.8 and earlier allows remote attackers to trigger a denial of service (memory corruption) by utilizing a crafted image file. This issue may be linked to the SDL_Image software.
The Impact of CVE-2019-19721
The vulnerability can lead to a denial of service condition and memory corruption, potentially enabling remote attackers to exploit the system.
Technical Details of CVE-2019-19721
This section delves into the technical aspects of the vulnerability.
Vulnerability Description
The vulnerability stems from an off-by-one error in the DecodeBlock function in codec/sdl_image.c, affecting VideoLAN VLC media player versions 3.0.8 and earlier.
Affected Systems and Versions
- Product: VideoLAN VLC media player
- Vendor: VideoLAN
- Versions affected: 3.0.8 and earlier
Exploitation Mechanism
Remote attackers can exploit this vulnerability by using a manipulated image file to trigger a denial of service condition and memory corruption.
Mitigation and Prevention
Protective measures to address and prevent the exploitation of CVE-2019-19721.
Immediate Steps to Take
- Update VideoLAN VLC media player to version 3.0.9 or later to mitigate the vulnerability.
- Avoid opening image files from untrusted or unknown sources.
Long-Term Security Practices
- Regularly update software and applications to the latest versions to patch known vulnerabilities.
- Implement network security measures to prevent unauthorized access to systems.
Patching and Updates
- Apply patches and updates provided by VideoLAN to address the off-by-one error and enhance system security.