CVE-2018-17785 : What You Need to Know

A vulnerability in the blynk-server prior to version 0.39.7 allows for Directory Traversal through the use of ../ in a URI that begins with /static or /static/js. This vulnerability can be exploited to read sensitive files such as /etc/passwd.

Understanding CVE-2018-17785

This CVE identifies a Directory Traversal vulnerability in the blynk-server software.

What is CVE-2018-17785?

CVE-2018-17785 is a security vulnerability in blynk-server versions prior to 0.39.7 that enables attackers to perform Directory Traversal attacks.

The Impact of CVE-2018-17785

The vulnerability allows unauthorized access to sensitive files, potentially leading to information disclosure and unauthorized data manipulation.

Technical Details of CVE-2018-17785

This section provides technical insights into the vulnerability.

Vulnerability Description

The vulnerability in blynk-server before version 0.39.7 allows Directory Traversal by utilizing ../ in a URI starting with /static or /static/js, enabling access to critical files like /etc/passwd.

Affected Systems and Versions

Affected Product: blynk-server
Affected Versions: Versions prior to 0.39.7

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the URI with ../ to traverse directories and access sensitive files.

Mitigation and Prevention

Protecting systems from CVE-2018-17785 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update blynk-server to version 0.39.7 or newer to mitigate the vulnerability.
Implement proper input validation to prevent directory traversal attacks.

Long-Term Security Practices

Regularly monitor and audit file access permissions.
Conduct security assessments to identify and address similar vulnerabilities.

Patching and Updates

Apply security patches promptly to address known vulnerabilities and enhance system security.