CVE-2018-7689 : Exploit Details and Defense Strategies
Learn about CVE-2018-7689, a vulnerability in Open Build Service by openSUSE allowing authenticated users to modify packages without write permissions. Find out the impact, affected systems, and mitigation steps.
Open Build Service arbitrary package modification
Understanding CVE-2018-7689
This CVE involves a vulnerability in the Open Build Service by openSUSE that allowed authenticated users to modify packages without the necessary write permissions.
What is CVE-2018-7689?
Authenticated users could alter packages in openSUSE Open Build Service before version 2.9.3, bypassing required write permissions due to a lack of permission checks in the InitializeDevelPackage function.
The Impact of CVE-2018-7689
The vulnerability had a CVSS base score of 7.1, indicating a high severity issue with integrity impact.
Technical Details of CVE-2018-7689
Vulnerability Description
The InitializeDevelPackage function in openSUSE Open Build Service before 2.9.3 lacked permission checks, enabling authenticated users to modify packages where they lacked write permissions.
Affected Systems and Versions
- Product: Open Build Service
- Vendor: openSUSE
- Versions Affected: < 2.9.3 (unspecified/custom)
Exploitation Mechanism
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: Low
- User Interaction: None
- Scope: Unchanged
- Confidentiality Impact: None
- Integrity Impact: High
- Availability Impact: Low
Mitigation and Prevention
Immediate Steps to Take
- Upgrade Open Build Service to version 2.9.3 or newer.
- Monitor package modifications by authenticated users.
Long-Term Security Practices
- Implement strict permission checks in all functions handling package modifications.
- Regularly review and update access control policies.
Patching and Updates
- Apply security patches promptly.
- Stay informed about security advisories from openSUSE.