CVE-2019-10912 : Vulnerability Insights and Analysis

CVE-2019-10912 is a vulnerability found in Symfony versions prior to 2.8.50, 3.x prior to 3.4.26, 4.x prior to 4.1.12, and 4.2.x prior to 4.2.7. This vulnerability allows caching objects containing malicious user input, potentially leading to the unintended deletion of accessible files by the current user.

Understanding CVE-2019-10912

This section provides insights into the nature and impact of the CVE-2019-10912 vulnerability.

What is CVE-2019-10912?

In Symfony versions before the specified updates, a flaw exists where caching objects with potentially harmful user input can result in the deletion of files accessible to the user during serialization or unserialization. The issue is associated with symfony/cache and symfony/phpunit-bridge.

The Impact of CVE-2019-10912

The vulnerability in CVE-2019-10912 could be exploited by attackers to delete files that the current user has access to, posing a risk to the integrity and confidentiality of data stored on affected systems.

Technical Details of CVE-2019-10912

This section delves into the technical aspects of the CVE-2019-10912 vulnerability.

Vulnerability Description

The vulnerability arises from the improper caching of objects that may contain malicious user input, leading to file deletion upon serialization or unserialization.

Affected Systems and Versions

Symfony versions prior to 2.8.50, 3.x before 3.4.26, 4.x before 4.1.12, and 4.2.x before 4.2.7

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating cached objects containing harmful input, triggering file deletions accessible to the user during serialization or unserialization.

Mitigation and Prevention

Protecting systems from CVE-2019-10912 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Symfony to versions 2.8.50, 3.4.26, 4.1.12, or 4.2.7 to mitigate the vulnerability.
Monitor system logs for any suspicious file deletion activities.

Long-Term Security Practices

Implement secure coding practices to prevent similar vulnerabilities in the future.
Regularly audit and review caching mechanisms for security flaws.

Patching and Updates

Apply patches and updates provided by Symfony to address the vulnerability and enhance system security.