CVE-2019-12479 : Exploit Details and Defense Strategies

A vulnerability has been identified in version 2.11.0 of 20|20 Storage, allowing unauthorized file access and modification through a Path Traversal flaw in the LocalStorageProvider.

Understanding CVE-2019-12479

This CVE involves a Path Traversal vulnerability in the TwentyTwenty.Storage library, potentially leading to unauthorized file operations outside the intended basepath.

What is CVE-2019-12479?

TwentyTwenty.Storage in version 2.11.0 is susceptible to a Path Traversal flaw, enabling attackers to create and access files beyond the designated basepath, compromising the security of the application.

The Impact of CVE-2019-12479

The vulnerability in LocalStorageProvider.cs can be exploited to read or modify files outside the expected directory, posing a risk of unauthorized data access or manipulation.

Technical Details of CVE-2019-12479

This section provides detailed technical insights into the CVE.

Vulnerability Description

The TwentyTwenty.Storage library in version 2.11.0 contains a Path Traversal vulnerability in LocalStorageProvider.cs, allowing unauthorized file access and modification.

Affected Systems and Versions

Product: 20|20 Storage
Version: 2.11.0

Exploitation Mechanism

The flaw arises when the application fails to properly validate user-supplied filenames, enabling attackers to traverse directories and access sensitive files.

Mitigation and Prevention

Protect your systems from CVE-2019-12479 with these mitigation strategies.

Immediate Steps to Take

Update to a patched version of 20|20 Storage to mitigate the vulnerability.
Implement input validation to sanitize user-supplied filenames.

Long-Term Security Practices

Regularly audit and review file access permissions within the application.
Train developers on secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Stay informed about security updates for TwentyTwenty.Storage to apply patches promptly and enhance system security.