CVE-2019-13226 Explained : Impact and Mitigation

In versions prior to 1.1.3, deepin-clone presents a security vulnerability due to a predictable path used in the Helper::temporaryMountDevice() function. This flaw allows an unprivileged user to mount a file system in an unintended location and potentially gain unauthorized access.

Understanding CVE-2019-13226

deepin-clone before version 1.1.3 is susceptible to a symlink attack that can be exploited by an attacker to manipulate the mounting of file systems.

What is CVE-2019-13226?

CVE-2019-13226 is a vulnerability in deepin-clone that allows an unprivileged user to create a symbolic link in a predictable path, leading to the mounting of a file system in an unintended location.

The Impact of CVE-2019-13226

The vulnerability enables an attacker to gain access to the mount point, potentially preventing the file system from being unmounted, compromising system integrity and confidentiality.

Technical Details of CVE-2019-13226

deepin-clone's vulnerability can be further understood through its technical aspects.

Vulnerability Description

In deepin-clone versions prior to 1.1.3, a predictable path is used for temporary file system mounting, allowing an unprivileged user to create a symbolic link and manipulate the mount location.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions prior to 1.1.3

Exploitation Mechanism

The vulnerability is exploited by creating a symbolic link at a specific path, leading to the file system being mounted in an unintended location. Additionally, a successful race condition can grant the attacker access to the mount point.

Mitigation and Prevention

Protecting systems from CVE-2019-13226 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update deepin-clone to version 1.1.3 or newer to mitigate the vulnerability.
Monitor system logs for any suspicious activities related to file system mounting.

Long-Term Security Practices

Implement the principle of least privilege to restrict unprivileged users' ability to create symbolic links.
Regularly review and update file system mounting procedures to prevent similar vulnerabilities.

Patching and Updates

Ensure timely patching of deepin-clone to the latest version to address the vulnerability and enhance system security.