CVE-2021-46671 Explained : Impact and Mitigation

options.c in atftp before 0.7.5 reads past the end of an array, disclosing server-side /etc/group data to a remote client.

Understanding CVE-2021-46671

options.c in atftp before 0.7.5 exposes sensitive data to unauthorized clients.

What is CVE-2021-46671?

CVE-2021-46671 involves atftp's options.c file, which exposes /etc/group data to remote clients due to a boundary error.

The Impact of CVE-2021-46671

The vulnerability allows unauthorized access to server-side data, potentially compromising system integrity and confidentiality.

Technical Details of CVE-2021-46671

options.c in atftp before 0.7.5 contains a flaw that exposes sensitive data.

Vulnerability Description

An array boundary error in options.c allows remote clients to access server-side /etc/group data.

Affected Systems and Versions

Products: Not applicable
Vendor: Not applicable
Versions: All versions before 0.7.5 are affected

Exploitation Mechanism

Attackers exploit the boundary error in the options.c file to access and disclose server-side /etc/group data.

Mitigation and Prevention

Steps to secure systems and prevent unauthorized data access.

Immediate Steps to Take

Update atftp to version 0.7.5 or later
Implement network-level access controls
Monitor network traffic for suspicious activities

Long-Term Security Practices

Regular security assessments and audits
Enforce the principle of least privilege
Educate users on secure data handling practices

Patching and Updates

Apply patches provided by the software vendor
Stay informed about security updates and vulnerability disclosures