CVE-2019-10071 Explained : Impact and Mitigation

Apache Tapestry versions 5.4.0 to 5.4.3 are affected by a vulnerability that could lead to remote code execution due to a timing side channel issue in HMAC signature verification.

Understanding CVE-2019-10071

This CVE involves a vulnerability in Apache Tapestry that could allow attackers to execute remote code by exploiting a timing side channel during HMAC signature verification.

What is CVE-2019-10071?

The vulnerability in Apache Tapestry arises from using String.equals() for HMAC signature comparisons, creating a timing side channel that can be exploited by attackers to achieve remote code execution.

The Impact of CVE-2019-10071

The vulnerability poses a significant risk of remote code execution if attackers can determine the correct HMAC signature for their payload, potentially leading to unauthorized access and data breaches.

Technical Details of CVE-2019-10071

Apache Tapestry 5.4.0 to 5.4.3 is susceptible to a timing side channel vulnerability in HMAC signature verification.

Vulnerability Description

The issue stems from using String.equals() for comparisons, allowing attackers to exploit timing discrepancies to determine the correct HMAC signature and execute remote code.

Affected Systems and Versions

Product: Apache Tapestry
Vendor: Apache
Versions Affected: Apache Tapestry 5.4.0 to 5.4.3

Exploitation Mechanism

Attackers can exploit the timing side channel vulnerability in HMAC signature verification by leveraging the String.equals() method for comparisons.

Mitigation and Prevention

To address CVE-2019-10071 and prevent potential remote code execution, follow these mitigation steps:

Immediate Steps to Take

Update Apache Tapestry to a patched version that addresses the timing side channel vulnerability.
Implement a constant time algorithm for HMAC signature comparisons to mitigate timing side channel attacks.

Long-Term Security Practices

Regularly monitor and update software components to address known vulnerabilities.
Conduct security assessments and code reviews to identify and remediate potential security weaknesses.

Patching and Updates

Stay informed about security advisories and updates from Apache to promptly apply patches that address CVE-2019-10071.