CVE-2019-19383 : Security Advisory and Response

freeFTPd 1.0.8 is affected by a Post-Authentication Buffer Overflow vulnerability that can be exploited through a crafted SIZE command, even if logging is disabled.

Understanding CVE-2019-19383

This CVE involves a critical vulnerability in freeFTPd version 1.0.8 that allows for a Post-Authentication Buffer Overflow attack.

What is CVE-2019-19383?

The Post-Authentication Buffer Overflow vulnerability in freeFTPd version 1.0.8 can be exploited using a specifically crafted SIZE command, posing a significant security risk.

The Impact of CVE-2019-19383

This vulnerability allows attackers to execute arbitrary code on the affected system, potentially leading to unauthorized access, data theft, or system compromise.

Technical Details of CVE-2019-19383

freeFTPd 1.0.8 is susceptible to a Post-Authentication Buffer Overflow via a maliciously crafted SIZE command, which remains exploitable even with logging disabled.

Vulnerability Description

The vulnerability arises from improper handling of user-supplied input, leading to a buffer overflow condition that can be leveraged by attackers to execute malicious code.

Affected Systems and Versions

Product: freeFTPd
Version: 1.0.8

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a specially crafted SIZE command to the freeFTPd server, triggering a buffer overflow and potentially gaining unauthorized access.

Mitigation and Prevention

To address CVE-2019-19383 and enhance system security, follow these mitigation strategies:

Immediate Steps to Take

Disable the affected service until a patch is available.
Monitor network traffic for any suspicious activity.
Implement strong firewall rules to restrict access to the vulnerable service.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Conduct security assessments and penetration testing to identify and remediate vulnerabilities.

Patching and Updates

Check for updates from the software vendor and apply patches as soon as they are released to mitigate the vulnerability effectively.