CVE-2019-7283 : Security Advisory and Response
Discover the security flaw in the rcp protocol implementation within NetKit up to version 0.17, allowing malicious entities to overwrite files on the client machine. Learn about the impact, affected systems, exploitation mechanism, and mitigation steps.
A vulnerability was discovered in the rcp protocol implementation within NetKit up to version 0.17, allowing a malicious rsh server or a Man-in-The-Middle attacker to overwrite files on the rcp client machine.
Understanding CVE-2019-7283
This CVE entry highlights a security issue in the rcp protocol implementation within NetKit up to version 0.17.
What is CVE-2019-7283?
The vulnerability in CVE-2019-7283 arises from improper validation of object names by the rcp client during an rcp operation, potentially leading to unauthorized file overwriting by a malicious entity.
The Impact of CVE-2019-7283
The vulnerability could be exploited by a malicious rsh server or a Man-in-The-Middle attacker to overwrite any files of their choice in a directory on the rcp client machine, posing a significant security risk.
Technical Details of CVE-2019-7283
This section delves into the technical aspects of the CVE-2019-7283 vulnerability.
Vulnerability Description
The rcp client lacks proper validation of received object names, enabling attackers to overwrite files on the client machine.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Up to NetKit version 0.17
Exploitation Mechanism
- During an rcp operation, the server selects files or directories to be sent to the client.
- The rcp client fails to adequately validate the object name received, allowing malicious entities to overwrite files on the client machine.
Mitigation and Prevention
Protecting systems from CVE-2019-7283 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update NetKit to a patched version that addresses the vulnerability.
- Implement network segmentation to limit exposure to potential attackers.
Long-Term Security Practices
- Regularly monitor and audit file changes on critical systems.
- Educate users on safe file transfer practices to prevent unauthorized access.
Patching and Updates
- Apply security patches provided by NetKit promptly to mitigate the vulnerability and enhance system security.