CVE-2019-13229 : Exploit Details and Defense Strategies

A vulnerability in the Helper::getPartitionSizeInfo() function of deepin-clone before version 1.1.3 allowed unprivileged users to launch symlink attacks, potentially compromising the file system.

Understanding CVE-2019-13229

This CVE describes a security issue in deepin-clone that could be exploited by attackers to create or overwrite files in the file system.

What is CVE-2019-13229?

CVE-2019-13229 is a vulnerability in deepin-clone's handling of log files, allowing unprivileged users to manipulate file paths and potentially compromise system integrity.

The Impact of CVE-2019-13229

The vulnerability enabled attackers to perform symlink attacks, granting them unauthorized access to system files and directories.

Technical Details of CVE-2019-13229

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The flaw in deepin-clone before version 1.1.3 allowed unprivileged users to exploit a fixed path in the Helper::getPartitionSizeInfo() function to create or overwrite files through symlink attacks.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions before 1.1.3

Exploitation Mechanism

Attackers could abuse the fixed path /tmp/partclone.log to write log files with root access, following symlinks and potentially compromising system files.

Mitigation and Prevention

Protecting systems from CVE-2019-13229 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 symlink activities.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access.
Regularly audit and review file system permissions to prevent unauthorized changes.

Patching and Updates

Stay informed about security advisories and promptly apply patches to address known vulnerabilities.