CVE-2017-2624 : Exploit Details and Defense Strategies

CVE-2017-2624 was published on July 27, 2018, and affects xorg-x11-server up to version 1.19.0. The vulnerability allows for a potential brute force attack due to a time discrepancy in the memcmp() function implementation.

Understanding CVE-2017-2624

This CVE involves a security issue in xorg-x11-server that could be exploited by a malicious actor to execute a more efficient brute force attack.

What is CVE-2017-2624?

The vulnerability in xorg-x11-server versions up to 1.19.0 allows for a time discrepancy exploitation in the memcmp() function, enabling a more efficient brute force attack.

The Impact of CVE-2017-2624

The vulnerability poses a medium severity risk with a CVSS base score of 5.9. It affects systems using Xorg, potentially leading to a compromise of high confidentiality.

Technical Details of CVE-2017-2624

This section provides more technical insights into the vulnerability.

Vulnerability Description

The issue arises from the memcmp() function's behavior when validating MIT cookies, creating a time discrepancy that can be leveraged for a brute force attack.

Affected Systems and Versions

Product: xorg-x11-server
Vendor: Xorg
Versions affected: Up to 1.19.0

Exploitation Mechanism

Attack Complexity: High
Attack Vector: Local
Privileges Required: None
User Interaction: None
Scope: Changed
Confidentiality Impact: High
Integrity Impact: None
Availability Impact: None

Mitigation and Prevention

Protecting systems from CVE-2017-2624 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches promptly to mitigate the vulnerability.
Monitor for any unusual activities that could indicate exploitation.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Implement network segmentation and access controls to limit exposure to potential attacks.

Patching and Updates

Stay informed about security advisories and updates from Xorg and relevant vendors to apply patches as soon as they are available.