CVE-2019-11690 : What You Need to Know
Learn about CVE-2019-11690 affecting Das U-Boot versions v2014.04 to v2019.04. Understand the impact, affected systems, exploitation, and mitigation steps to secure systems.
Das U-Boot versions v2014.04 to v2019.04 are vulnerable due to the absence of a srand call in the gen_rand_uuid function, allowing malicious actors to deduce UUID values when CONFIG_RANDOM_UUID is enabled.
Understanding CVE-2019-11690
What is CVE-2019-11690?
The vulnerability lies in the gen_rand_uuid function in Das U-Boot versions v2014.04 to v2019.04, where a missing srand call exposes UUID values.
The Impact of CVE-2019-11690
This vulnerability enables attackers to determine UUID values when CONFIG_RANDOM_UUID is turned on, potentially compromising the security of systems relying on Das U-Boot for UUID values.
Technical Details of CVE-2019-11690
Vulnerability Description
The gen_rand_uuid function in Das U-Boot lacks an srand call, allowing attackers to deduce UUID values.
Affected Systems and Versions
- Das U-Boot versions v2014.04 to v2019.04
Exploitation Mechanism
- Attackers can exploit the vulnerability to determine UUID values when CONFIG_RANDOM_UUID is enabled.
Mitigation and Prevention
Immediate Steps to Take
- Disable CONFIG_RANDOM_UUID if not essential
- Implement secure random number generation mechanisms
Long-Term Security Practices
- Regularly update Das U-Boot to patched versions
- Monitor for any suspicious UUID activity
- Conduct security audits to identify and address similar vulnerabilities
Patching and Updates
- Apply patches provided by Das U-Boot to address the srand call issue