CVE-2020-28374 : Exploit Details and Defense Strategies
Learn about CVE-2020-28374, a Linux kernel vulnerability allowing remote attackers to read or write files. Find mitigation steps and prevention measures here.
A vulnerability in the Linux kernel before version 5.10.7 allows remote attackers to read or write files through insufficient identifier checking in the LIO SCSI target code.
Understanding CVE-2020-28374
This CVE identifies a security flaw in the Linux kernel that can be exploited by attackers to gain unauthorized access to files.
What is CVE-2020-28374?
In the Linux kernel before version 5.10.7, a lack of proper identifier validation in the LIO SCSI target code enables remote attackers to perform file read or write operations through directory traversal in an XCOPY request.
The Impact of CVE-2020-28374
This vulnerability allows attackers to manipulate file access by leveraging I/O operations through an attacker-selected backstore, potentially leading to unauthorized data access or modification.
Technical Details of CVE-2020-28374
This section delves into the technical aspects of the CVE.
Vulnerability Description
The vulnerability arises from insufficient identifier validation in the LIO SCSI target code within the Linux kernel, enabling attackers to exploit directory traversal in XCOPY requests.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: All versions before Linux kernel 5.10.7
Exploitation Mechanism
Attackers can exploit this vulnerability remotely by sending malicious XCOPY requests, allowing them to read or write files through directory traversal.
Mitigation and Prevention
Protecting systems from CVE-2020-28374 involves immediate actions and long-term security practices.
Immediate Steps to Take
- Apply the latest security patches provided by the Linux kernel maintainers.
- Monitor network traffic for any suspicious XCOPY requests.
- Restrict access to iSCSI LUNs to authorized users only.
Long-Term Security Practices
- Regularly update the Linux kernel to the latest stable version.
- Implement network segmentation to isolate critical systems.
- Conduct regular security audits to identify and address vulnerabilities.
Patching and Updates
Ensure timely installation of security patches released by the Linux kernel maintainers to mitigate the CVE-2020-28374 vulnerability.