CVE-2018-14660 : What You Need to Know

A vulnerability has been discovered in glusterfs server versions 4.1.4 and 3.1.2, allowing an attacker to deplete memory by exploiting repeated use of GF_META_LOCK_KEY xattr.

Understanding CVE-2018-14660

This CVE involves a vulnerability in glusterfs server versions 4.1.4 and 3.1.2 that could lead to memory depletion through the repeated utilization of a specific xattr.

What is CVE-2018-14660?

The vulnerability enables an authenticated remote attacker to establish multiple locks for a single inode, causing memory exhaustion on the glusterfs server node.

The Impact of CVE-2018-14660

CVSS Score: 6.5 (Medium Severity)
Attack Vector: Network
Attack Complexity: Low
Availability Impact: High
Privileges Required: Low
Scope: Unchanged
The vulnerability does not impact confidentiality or integrity but can lead to denial of service due to memory depletion.

Technical Details of CVE-2018-14660

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows an attacker to exhaust memory by repeatedly using the GF_META_LOCK_KEY xattr on glusterfs server versions 4.1.4 and 3.1.2.

Affected Systems and Versions

Glusterfs server versions through 4.1.4
Glusterfs server versions through 3.1.2

Exploitation Mechanism

An authenticated remote attacker can exploit this vulnerability by establishing multiple locks for a single inode, leading to memory depletion through the repetitive use of setxattr.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2018-14660.

Immediate Steps to Take

Apply the patches provided by the vendor promptly.
Monitor system resources for any unusual memory consumption.
Restrict network access to vulnerable systems.

Long-Term Security Practices

Regularly update and patch all software and systems.
Conduct security assessments and audits to identify vulnerabilities proactively.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Refer to the vendor advisories for patching instructions and update schedules.