CVE-2019-9579 : Exploit Details and Defense Strategies
Learn about CVE-2019-9579, a vulnerability in Illumos within Nexenta NexentaStor 4.0.5 and 5.1.2, allowing unauthorized access to the SMB server. Find out the impact, affected systems, and mitigation steps.
A vulnerability has been identified in Illumos within Nexenta NexentaStor 4.0.5 and 5.1.2, as well as other related products, allowing unauthorized access to the SMB server.
Understanding CVE-2019-9579
This CVE identifies a security flaw in Illumos within Nexenta NexentaStor versions 4.0.5 and 5.1.2, potentially enabling unauthorized access to the SMB server.
What is CVE-2019-9579?
The vulnerability permits attackers with WRITE_XATTR capability to modify permissions on the SMB server by exploiting a combination of factors related to ZFS extended attributes, SMB protocol implementations, and attribute requests.
The Impact of CVE-2019-9579
The vulnerability could lead to unauthorized access to the SMB server, potentially resulting in data breaches, unauthorized data modification, or disruption of services.
Technical Details of CVE-2019-9579
This section delves into the technical aspects of the CVE.
Vulnerability Description
The vulnerability arises from the interaction of ZFS extended attributes, SMB protocol requirements, and attribute forwarding by the SMB server, allowing unauthorized permission modifications.
Affected Systems and Versions
- Illumos within Nexenta NexentaStor 4.0.5 and 5.1.2
- Other related products
Exploitation Mechanism
- Utilization of ZFS extended attributes
- Requirement of SMB protocol implementations to have open handle semantics
- Forwarding of specific attribute requests by the SMB server
Mitigation and Prevention
Protecting systems from CVE-2019-9579 is crucial to maintaining security.
Immediate Steps to Take
- Apply vendor-supplied patches promptly
- Monitor network traffic for any suspicious activity
- Restrict access to the SMB server to authorized users only
Long-Term Security Practices
- Regularly update and patch software and systems
- Conduct security audits and penetration testing to identify vulnerabilities
Patching and Updates
- Stay informed about security updates from Illumos, Nexenta, and related vendors
- Implement patches as soon as they are available to mitigate the vulnerability