CVE-2020-7040 : What You Need to Know
Learn about CVE-2020-7040, a vulnerability in storeBackup.pl allowing symlink attacks for privilege escalation. Find mitigation steps and preventive measures here.
storeBackup.pl in storeBackup through 3.5 relies on the /tmp/storeBackup.lock pathname, allowing symlink attacks that may lead to privilege escalation.
Understanding CVE-2020-7040
What is CVE-2020-7040?
CVE-2020-7040 is a vulnerability in storeBackup.pl in storeBackup through version 3.5 that can be exploited by local users to potentially escalate privileges through symlink attacks.
The Impact of CVE-2020-7040
The vulnerability allows local users to create a plain file named /tmp/storeBackup.lock, which can block the use of storeBackup until manually removed by an admin.
Technical Details of CVE-2020-7040
Vulnerability Description
The issue arises from storeBackup.pl relying on the fixed path /tmp/storeBackup.lock, making it susceptible to symlink attacks.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: All versions up to 3.5
Exploitation Mechanism
- Attackers can create a symlink to /tmp/storeBackup.lock, potentially leading to privilege escalation.
Mitigation and Prevention
Immediate Steps to Take
- Remove any unauthorized /tmp/storeBackup.lock files.
- Regularly monitor and clean up the /tmp directory.
Long-Term Security Practices
- Implement least privilege access controls.
- Conduct regular security audits and vulnerability assessments.
Patching and Updates
- Apply the latest patches and updates from the software vendor.