CVE-2017-16837 : Vulnerability Insights and Analysis
Learn about CVE-2017-16837 affecting Trusted Boot (tboot) versions 1.9.6 and below. Discover how unvalidated function pointers can lead to arbitrary code execution and manipulation of Trusted Platform Module (TPM) dynamic PCRs.
CVE-2017-16837 was published on November 16, 2017, and affects Trusted Boot (tboot) versions 1.9.6 and below. The vulnerability allows for unvalidated function pointers that can lead to arbitrary code execution, enabling local users to manipulate function pointers and overwrite dynamic PCRs of the Trusted Platform Module (TPM).
Understanding CVE-2017-16837
This CVE entry highlights a security flaw in Trusted Boot (tboot) that can be exploited by local users to execute arbitrary code and tamper with TPM dynamic PCRs.
What is CVE-2017-16837?
Unvalidated function pointers within Trusted Boot (tboot) version 1.9.6 and below can enable arbitrary code execution, allowing local users to manipulate function pointers and overwrite dynamic PCRs of the TPM.
The Impact of CVE-2017-16837
The vulnerability poses a significant risk as it can be exploited by local users to compromise the integrity of the Trusted Platform Module (TPM) and execute arbitrary code.
Technical Details of CVE-2017-16837
Trusted Boot (tboot) versions 1.9.6 and below are susceptible to unvalidated function pointers that can lead to arbitrary code execution.
Vulnerability Description
Certain function pointers in Trusted Boot (tboot) through 1.9.6 are not validated, allowing for arbitrary code execution and potential manipulation of TPM dynamic PCRs.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Versions: 1.9.6 and below
Exploitation Mechanism
Local users can exploit the unvalidated function pointers in Trusted Boot (tboot) to execute arbitrary code and tamper with the Trusted Platform Module's dynamic PCRs.
Mitigation and Prevention
To address CVE-2017-16837, immediate steps and long-term security practices are recommended.
Immediate Steps to Take
- Update Trusted Boot (tboot) to a patched version if available
- Monitor and restrict access to vulnerable systems
Long-Term Security Practices
- Implement least privilege access controls
- Regularly update and patch system components
Patching and Updates
- Check for security advisories and patches from Trusted Boot (tboot) for a fix to the vulnerability