CVE-2021-36762 : Vulnerability Insights and Analysis

An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3, where the TFTP packet processing function doesn't adequately ensure that a filename is '\0' terminated. This could lead to out-of-bounds read when calling strlen for the filename.

Understanding CVE-2021-36762

This section dives into the details of the CVE-2021-36762 vulnerability.

What is CVE-2021-36762?

CVE-2021-36762 is a vulnerability found in HCC Embedded InterNiche NicheStack through version 4.3. The issue arises from the TFTP packet processing function failing to properly terminate filenames, potentially causing buffer overflows.

The Impact of CVE-2021-36762

The vulnerability could be exploited to read out-of-bounds data in the protocol packet buffer, resulting in a security risk to the affected systems.

Technical Details of CVE-2021-36762

Let's explore the technical aspects of CVE-2021-36762 in more detail.

Vulnerability Description

The flaw in the tfshnd():tftpsrv.c function allows for the possibility of reading out-of-bounds information due to inadequate filename termination.

Affected Systems and Versions

HCC Embedded InterNiche NicheStack versions up to 4.3 are impacted by this vulnerability.

Exploitation Mechanism

By manipulating the TFTP packet processing function, threat actors could potentially exploit this vulnerability to gain unauthorized access or disrupt services.

Mitigation and Prevention

Safeguard your systems against CVE-2021-36762 with the following security measures.

Immediate Steps to Take

Update the affected systems to the latest patched versions provided by HCC Embedded InterNiche. Implement network security controls to prevent unauthorized access.

Long-Term Security Practices

Regularly monitor for security updates from software vendors and apply patches promptly. Conduct security assessments to identify and remediate vulnerabilities proactively.

Patching and Updates

Stay informed about security bulletins and advisories related to HCC Embedded InterNiche NicheStack to deploy patches and updates timely.