CVE-2018-17955 : What You Need to Know

Yast2-multipath, prior to version 4.1.1, contains a vulnerability that allows local attackers to overwrite files due to a fixed temporary filename lacking symlink protection.

Understanding CVE-2018-17955

This CVE involves a static tempfile name vulnerability in yast2-multipath that can be exploited by local attackers.

What is CVE-2018-17955?

In yast2-multipath before version 4.1.1, a static temporary filename allows local attackers to overwrite files on systems without symlink protection.

The Impact of CVE-2018-17955

CVSS Base Score: 2.2 (Low)
Attack Vector: Local
Attack Complexity: High
Privileges Required: Low
User Interaction: Required
Integrity Impact: Low
This vulnerability does not impact confidentiality or availability.

Technical Details of CVE-2018-17955

Yast2-multipath vulnerability details and affected systems.

Vulnerability Description

The vulnerability arises from a fixed temporary filename in yast2-multipath, enabling local attackers to overwrite files on systems lacking symlink protection.

Affected Systems and Versions

Affected Product: yast2-multipath
Vendor: SUSE
Vulnerable Versions: < 4.1.1 (unspecified version type: custom)

Exploitation Mechanism

The vulnerability can be exploited locally by manipulating the fixed temporary filename to overwrite files on vulnerable systems.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2018-17955.

Immediate Steps to Take

Update yast2-multipath to version 4.1.1 or newer to eliminate the vulnerability.
Implement symlink protection on systems to prevent file overwriting attacks.

Long-Term Security Practices

Regularly monitor and update software to patch known vulnerabilities.
Enforce least privilege access to limit the impact of potential attacks.

Patching and Updates

Stay informed about security advisories from SUSE and apply patches promptly to secure systems.