CVE-2017-1000413 : Security Advisory and Response

OP-TEE version 2.4.0 and earlier by Linaro is vulnerable to a timing attack on the Montgomery components of libMPA, potentially leading to the compromise of a private RSA key.

Understanding CVE-2017-1000413

OP-TEE, an open-source Trusted Execution Environment (TEE) solution, has a security vulnerability in versions prior to 2.4.0.

What is CVE-2017-1000413?

The vulnerability in OP-TEE allows for a timing attack on the Montgomery parts of libMPA, which could result in the exposure of a private RSA key.

The Impact of CVE-2017-1000413

Exploiting this vulnerability could lead to the unauthorized access and compromise of sensitive data protected by OP-TEE, particularly the RSA key.

Technical Details of CVE-2017-1000413

OP-TEE version 2.4.0 and earlier are affected by this vulnerability.

Vulnerability Description

The vulnerability in OP-TEE arises from a timing attack on the Montgomery components of libMPA, potentially enabling the extraction of a private RSA key.

Affected Systems and Versions

OP-TEE version 2.4.0 and previous versions

Exploitation Mechanism

Attack targets the Montgomery components of libMPA in OP-TEE
Timing attack allows for the compromise of a private RSA key

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Update OP-TEE to a secure version (e.g., version 2.5.0)
Monitor for any unauthorized access or unusual activities
Implement additional security measures to protect sensitive data

Long-Term Security Practices

Regularly update and patch OP-TEE to the latest secure versions
Conduct security assessments and audits to identify and mitigate potential vulnerabilities

Patching and Updates

Apply patches and security updates provided by Linaro for OP-TEE to address this vulnerability