CVE-2020-15152 : Vulnerability Insights and Analysis

ftp-srv is an npm package designed as a modern and extensible FTP server. Versions before 2.19.6, 3.1.2, and 4.3.4 are vulnerable to Server-Side Request Forgery, allowing arbitrary IPs in the PORT command. This can lead to unauthorized connections. Mitigation involves blocking the PORT command. The vulnerability is fixed in versions 2.19.6, 3.1.2, and 4.3.4.

Understanding CVE-2020-15152

This CVE identifies a Server-Side Request Forgery vulnerability in the ftp-srv npm package.

What is CVE-2020-15152?

Server-Side Request Forgery (SSRF) vulnerability in ftp-srv allows attackers to manipulate the PORT command, potentially leading to unauthorized connections.

The Impact of CVE-2020-15152

The vulnerability has a CVSS base score of 9.1 (Critical severity) with high impacts on confidentiality and integrity, requiring no special privileges for exploitation.

Technical Details of CVE-2020-15152

ftp-srv vulnerability details and affected systems.

Vulnerability Description

ftp-srv versions before 2.19.6, 3.1.2, and 4.3.4 are susceptible to SSRF due to unrestricted IPs in the PORT command.

Affected Systems and Versions

Products: ftp-srv
Vendor: autovance
Vulnerable Versions: >= 1.0.0, < 2.19.6; >= 3.0.0, < 3.1.2; >= 4.0.0, < 4.3.4

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Scope: Unchanged
User Interaction: None
Exploitation: Attackers can exploit the vulnerability without requiring special privileges.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2020-15152 vulnerability.

Immediate Steps to Take

Update to versions 2.19.6, 3.1.2, or 4.3.4 to eliminate the vulnerability.
Configure firewalls to block the PORT command.

Long-Term Security Practices

Regularly update software to patch vulnerabilities.
Implement network segmentation to limit potential attack surfaces.

Patching and Updates

Apply patches provided by autovance for ftp-srv to address the SSRF vulnerability.