CVE-2019-11365 : What You Need to Know

A security vulnerability was found in atftpd, specifically in atftp version 0.7.1, allowing a remote attacker to trigger a stack-based buffer overflow by sending a crafted packet. This vulnerability stems from an insecure implementation of the strncpy function.

Understanding CVE-2019-11365

This CVE pertains to a security flaw in atftpd version 0.7.1 that can be exploited by a malicious remote attacker.

What is CVE-2019-11365?

CVE-2019-11365 is a vulnerability in atftpd, where an attacker can exploit a stack-based buffer overflow by sending a specially crafted packet due to insecure strncpy implementation.

The Impact of CVE-2019-11365

The vulnerability allows remote attackers to execute arbitrary code or crash the service, posing a significant risk to the affected systems.

Technical Details of CVE-2019-11365

This section provides more technical insights into the CVE-2019-11365 vulnerability.

Vulnerability Description

The issue arises from an insecure implementation of the strncpy function, allowing a remote attacker to trigger a stack-based buffer overflow by sending a specific packet.

Affected Systems and Versions

Product: atftpd
Vendor: n/a
Version: 0.7.1

Exploitation Mechanism

The vulnerability can be exploited by sending an error packet of 3 bytes or less, leveraging the insecure strncpy pattern in various files within the code base.

Mitigation and Prevention

Protecting systems from CVE-2019-11365 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update atftp to a patched version that addresses the vulnerability.
Implement network-level protections to filter out potentially malicious packets.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update software and firmware to patch known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses.
Educate users and administrators about safe practices to prevent exploitation.

Patching and Updates

Ensure that all systems running atftpd are updated with the latest security patches to mitigate the risk of exploitation.