CVE-2020-10699 : Exploit Details and Defense Strategies

A flaw in Linux targetcli-fb versions 2.1.50 and 2.1.51 allows local attackers to escalate privileges to root by modifying iSCSI configuration.

Understanding CVE-2020-10699

This CVE identifies a vulnerability in the targetcli-fb package that could be exploited by a local attacker to gain root privileges.

What is CVE-2020-10699?

The flaw in targetcli-fb versions 2.1.50 and 2.1.51 allows the targetclid socket to be world-writable, enabling unauthorized modification of iSCSI configuration.

The Impact of CVE-2020-10699

The vulnerability poses a high risk, with a CVSS base score of 7.8, impacting confidentiality, integrity, and availability of affected systems.

Technical Details of CVE-2020-10699

The technical aspects of the CVE provide insight into the vulnerability's description, affected systems, and exploitation mechanism.

Vulnerability Description

The flaw in targetcli-fb versions 2.1.50 and 2.1.51 allows the targetclid socket to be world-writable.

Affected Systems and Versions

Vendor: Datera, Inc
Product: targetcli
Affected Version: Fixed in targetcli-fb 2.1.52

Exploitation Mechanism

Local attackers can exploit the world-writable targetclid socket to modify iSCSI configuration and escalate privileges to root.

Mitigation and Prevention

Protecting systems from CVE-2020-10699 involves immediate steps and long-term security practices.

Immediate Steps to Take

Disable the targetclid socket if not required.
Apply the vendor-provided patch to upgrade to targetcli-fb 2.1.52.

Long-Term Security Practices

Regularly monitor and restrict file permissions on critical system files.
Implement the principle of least privilege to limit user access.
Conduct security audits to detect and address vulnerabilities proactively.

Patching and Updates

Ensure timely installation of security patches and updates to mitigate known vulnerabilities.