CVE-2019-11889 : Exploit Details and Defense Strategies
Learn about CVE-2019-11889, a vulnerability in Sony BRAVIA Smart TV devices that allows remote attackers to cause a denial of service effect. Find out how to mitigate the risk and prevent exploitation.
Sony BRAVIA Smart TV devices are vulnerable to a denial of service attack when a specially crafted web page is accessed through HbbTV.
Understanding CVE-2019-11889
Malicious individuals can exploit a vulnerability in Sony BRAVIA Smart TV devices, leading to a denial of service effect where the device becomes unresponsive and hangs. This exploit occurs when a specially designed web page is accessed through HbbTV.
What is CVE-2019-11889?
This CVE refers to a vulnerability in Sony BRAVIA Smart TV devices that allows remote attackers to cause a denial of service (device hang) by using a crafted web page over HbbTV.
The Impact of CVE-2019-11889
- Attackers can render Sony BRAVIA Smart TVs unresponsive and cause them to hang, disrupting normal device functionality.
Technical Details of CVE-2019-11889
Sony BRAVIA Smart TV devices are susceptible to a specific type of attack that can lead to a denial of service condition.
Vulnerability Description
- The vulnerability allows remote attackers to trigger a denial of service effect on Sony BRAVIA Smart TVs by exploiting a flaw in the HbbTV functionality.
Affected Systems and Versions
- Product: Sony BRAVIA Smart TV
- Vendor: Sony
- Versions: All versions are affected
Exploitation Mechanism
- The exploit occurs when a specially crafted web page is accessed through HbbTV, causing the device to become unresponsive and hang.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent the exploitation of CVE-2019-11889.
Immediate Steps to Take
- Disable HbbTV functionality on Sony BRAVIA Smart TVs to mitigate the risk of exploitation.
- Regularly monitor for security updates and patches from Sony to address vulnerabilities.
Long-Term Security Practices
- Implement network segmentation to isolate smart TVs from critical systems.
- Educate users on safe browsing practices to avoid accessing potentially malicious web pages.
Patching and Updates
- Apply firmware updates and security patches provided by Sony to fix the vulnerability and enhance device security.